Papers with QA
Answering Naturally: Factoid to Full length Answer Generation (D19-54)
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| Challenge: | Factoid question answering systems extract answers for a question from passages, which are usually short spans of text . but, these spans would result in an unnatural reading experience in a conversational system . a pointer generator based full-length answer generator can be used with most QA systems . |
| Approach: | They propose a pointer generator based full-length answer generator which can be used with most QA systems. |
| Outcome: | The proposed system generates full length answer without relying on passage from which it was extracted. |
MoNaCo: More Natural and Complex Questions for Reasoning Across Dozens of Documents (2026.tacl-1)
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Tomer Wolfson, Harsh Trivedi, Mor Geva, Yoav Goldberg, Dan Roth, Tushar Khot, Ashish Sabharwal, Reut Tsarfaty
| Challenge: | Automated agents powered by large language models are becoming more ingrained into how people seek information . but evaluation benchmarks for LLMs rarely feature natural questions that are time-consuming . a new benchmark, MoNaCo, aims to address this gap by eliciting and manually answering time-wasting questions . |
| Approach: | They propose a benchmark of 1,315 natural and time-consuming questions that require dozens of intermediate steps to solve. |
| Outcome: | MoNaCo benchmarks achieve at least 61.2% F1 in real-world time-consuming questions hampered by low recall and hallucinations . Frontier LLMs evaluated on MoN achieving at least 61% F1, harmed by low memory and halluzinations. |
SF-QA: Simple and Fair Evaluation Library for Open-domain Question Answering (2021.eacl-demos)
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| Challenge: | Open-domain question answering (QA) requires large amounts of resources and is difficult to reproduce results due to complex configurations. |
| Approach: | They propose a simple and fair evaluation framework for open-domain question answering (QA) it modularizes the pipeline open- domain QA system, making it easily accessible . |
| Outcome: | The proposed evaluation framework is publicly available and anyone can contribute to the code and evaluations. |
Complex Reasoning in Natural Language (2023.acl-tutorials)
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| Challenge: | Recent research shows that pretrained language models are often brittle for complex reasoning tasks. |
| Approach: | They propose to use pre-trained language models to teach machines to reason over texts . they will review recent promising approaches to tackling complex reasoning tasks . |
| Outcome: | This tutorial reviews promising approaches to complex reasoning tasks . it reviews the methods that can be used to augment models with robustness . |
UKP-SQuARE v2: Explainability and Adversarial Attacks for Trustworthy QA (2022.aacl-demo)
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Rachneet Sachdeva, Haritz Puerto, Tim Baumgärtner, Sewin Tariverdian, Hao Zhang, Kexin Wang, Hossain Shaikh Saadi, Leonardo F. R. Ribeiro, Iryna Gurevych
| Challenge: | Question Answering (QA) systems rely on deep neural networks, which are difficult to interpret by humans. |
| Approach: | They propose an interpretable model that provides an explanation infrastructure for comparing models based on saliency maps and graph-based explanations. |
| Outcome: | The proposed methods can be used to compare models based on saliency maps and graph-based explanations. |
Talk to Papers: Bringing Neural Question Answering to Academic Search (2020.acl-demos)
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| Challenge: | Talk to Papers aims to improve the current experience of academic search by using open-domain question answering (QA) techniques. |
| Approach: | They propose to use open-domain question answering techniques to improve the current experience of academic search by combining natural language queries with machine reading at scale. |
| Outcome: | The proposed tool improves on existing search engines and provides a collaborative data collection tool to curate the first natural language processing research QA dataset. |
A Benchmark Suite of Japanese Natural Questions (2024.starsem-1)
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| Challenge: | Existing studies to solve QA tasks in an integrated manner are not available in other languages because of the lack of QA datasets. |
| Approach: | They build a Japanese version of Natural Questions using natural questions from query logs of a search engine and crowdsource it using crowdsourcing. |
| Outcome: | The proposed datasets are based on natural questions from Japanese search engines and crowdsourced. |
PrimeQA: The Prime Repository for State-of-the-Art Multilingual Question Answering Research and Development (2023.acl-demo)
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Avi Sil, Jaydeep Sen, Bhavani Iyer, Martin Franz, Kshitij Fadnis, Mihaela Bornea, Sara Rosenthal, Scott McCarley, Rong Zhang, Vishwajeet Kumar, Yulong Li, Md Arafat Sultan, Riyaz Bhat, Juergen Bross, Radu Florian, Salim Roukos
| Challenge: | Question Answering (QA) is a major area of research in Natural Language Processing (NLP) |
| Approach: | They propose a one-stop and open-source QA repository for question answering . it supports core QA functionalities like retrieval and reading comprehension . they say it will facilitate easy replication of state-of-the-art (SOTA) QA methods . |
| Outcome: | The proposed framework enables easy replication of state-of-the-art (SOTA) QA methods. |
Simple yet Effective Bridge Reasoning for Open-Domain Multi-Hop Question Answering (D19-58)
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| Challenge: | Existing work on open-domain multi-hop question answering relies on off-the-shelf information retrieval techniques to retrieve answer passages. |
| Approach: | They propose a new subproblem for open-domain multi-hop question answering . they aim to recognize the anchor from a set of start passages with a reading comprehension model . |
| Outcome: | The proposed method significantly improves the baseline method on the open-domain hotpotQA benchmark. |
AnswerQuest: A System for Generating Question-Answer Items from Multi-Paragraph Documents (2021.eacl-demos)
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| Challenge: | Existing systems that generate and answer questions in a question-and-answer format can facilitate reading comprehension. |
| Approach: | They propose a system that integrates question answering and question generation tasks to produce a list of Q&A items for a text. |
| Outcome: | The proposed system generates a catalog of Q&A items for a text. |
Towards building a Robust Industry-scale Question Answering System (2020.coling-industry)
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| Challenge: | Existing systems that use “zero-shot transfer learning” (ZSTL) are difficult to train and have observation biases. |
| Approach: | They propose a production model called GAAMA which has two characteristics . it is robust and efficient, and trains on the recently introduced Natural Questions dataset . |
| Outcome: | The proposed model performs on two benchmarks: BioASQ and CovidQA. |
Shortcomings of Question Answering Based Factuality Frameworks for Error Localization (2023.eacl-main)
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| Challenge: | Abstractive summarization systems often generate summaries with factual errors . many approaches to detect these errors have been proposed, but this capability has not been evaluated in past research . |
| Approach: | They propose to use question answering-based factuality metrics to detect errors in summaries . they find that QA-based frameworks fail to correctly identify error spans in generated summary . |
| Outcome: | The proposed methods outperform trivial exact match baselines in localizing errors in summaries. |
Do Multi-hop Readers Dream of Reasoning Chains? (D19-58)
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| Challenge: | Existing models for multihop reasoning are limited in their performance . multi-hop reasoning requires the ability to gather information from multiple passages . |
| Approach: | They propose a method that provides the full reasoning chain of multiple passages instead of just one final passage where the answer appears. |
| Outcome: | The proposed model improves on existing models by providing the full reasoning chain of multiple passages instead of just one final passage where the answer appears. |
PDFTriage: Question Answering over Long, Structured Documents (2024.emnlp-industry)
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| Challenge: | Existing approaches to document QA use a pre-retrieval step to retrieve the relevant context from documents, but this is incongruous with the user's mental model of the document. |
| Approach: | They propose an approach called PDFTriage that enables models to retrieve the context based on either structure or content. |
| Outcome: | The proposed approach can retrieve context based on structure or content across several classes of questions where existing retrieval-augmented LLMs fail. |
Unification-based Reconstruction of Multi-hop Explanations for Science Questions (2021.eacl-main)
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| Challenge: | Existing approaches build explanations considering each question in isolation, but new approach leverages explanatory patterns emerging in scientific explanations. |
| Approach: | They propose a framework for reconstructing multi-hop explanations in science Question Answering . they integrate lexical relevance with the notion of unification power to rank atomic facts . |
| Outcome: | The proposed method achieves results competitive with Transformers, but is faster and scalable to large explanatory corpora. |
Retrieval Enhanced Data Augmentation for Question Answering on Privacy Policies (2023.eacl-main)
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| Challenge: | Existing labeled datasets are heavily imbalanced, limiting the QA performance in this domain. |
| Approach: | They propose a question answering task that captures relevant text segments from unlabeled policy documents and expands the positive examples in the training set. |
| Outcome: | The proposed framework elevates the baseline by a large margin (10% F1) and achieves a new state-of-the-art F1 score of 50%. |
MinPrompt: Graph-based Minimal Prompt Data Augmentation for Few-shot Question Answering (2024.acl-long)
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| Challenge: | Recent advances in few-shot question answering rely on pre-trained large language models and fine-tuning in specific settings. |
| Approach: | They propose to select the most informative data for fine-tuning to improve efficiency . they use an approximate graph algorithm and unsupervised question generation to generate QA pairs . |
| Outcome: | The proposed framework improves the performance of the few-shot question answering task on the open-domain QA task. |
Multi-step Entity-centric Information Retrieval for Multi-Hop Question Answering (D19-58)
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Rajarshi Das, Ameya Godbole, Dilip Kavarthapu, Zhiyu Gong, Abhishek Singhal, Mo Yu, Xiaoxiao Guo, Tian Gao, Hamed Zamani, Manzil Zaheer, Andrew McCallum
| Challenge: | Multi-hop question answering (QA) requires an information retrieval system that can find multiple supporting evidence needed to answer the question. |
| Approach: | They propose a technique that uses information of entities present in the initial retrieved evidence to learn to ‘hop’ onto other relevant evidence. |
| Outcome: | The proposed method boosts retrieval performance on a multi-hop question answering dataset with 5 million Wikipedia paragraphs and a model without training increases its performance by 10.59 F1. |
Newspaper Signaling for Crisis Prediction (2024.naacl-demo)
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| Challenge: | Existing systems for detecting crisis-related signals are limited due to unstructured data, media, and cultural bias, and multiple languages. |
| Approach: | They propose a model for multi-lingual and open-domain newspaper signaling for detecting crisis-related indicators in newspaper articles. |
| Outcome: | The proposed model can detect crisis-related indicators in multiple languages and can be used in open crisis domains in real-time. |
Evaluating Question Answering Evaluation (D19-58)
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| Challenge: | Existing n-gram based QA metrics have a number of drawbacks and are not suitable for all extractive tasks. |
| Approach: | They propose to use BERTScore to evaluate translation for question answering (QA) they also explore whether existing n-gram based metrics are suitable for generative QA . |
| Outcome: | The proposed BERTScore metric fails to provide stronger correlation with human judgements . |
An Emotional Comfort Framework for Improving User Satisfaction in E-Commerce Customer Service Chatbots (2021.naacl-industry)
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| Challenge: | E-commerce has grown rapidly over the last several years, and chatbots for intelligent customer service are simultaneously drawing attention. |
| Approach: | They propose a framework to obtain proper answer to customers’ emotional questions using emotion classification model and text matching. |
| Outcome: | The proposed framework is very promising on real online systems. |
Training a Ranking Function for Open-Domain Question Answering (N18-4)
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| Challenge: | Recent advances in machine reading have inspired researchers to combine Information Retrieval with machine reading to tackle open-domain QA. |
| Approach: | They propose two neural network rankers that assign scores to different passages based on their likelihood of containing the answer to a given question. |
| Outcome: | The proposed models achieve human level performance in open-domain QA compared to reading comprehension-style QA because it is difficult to retrieve the pieces of paragraphs that contain the answer to the question. |
IFlyLegal: A Chinese Legal System for Consultation, Law Searching, and Document Analysis (D19-3)
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| Challenge: | Legal Tech is a system that performs legal consulting, multi-way law searching, and legal document analysis using deep contextual representations and various attention mechanisms. |
| Approach: | They propose a Chinese legal system that performs legal consulting, multi-way law searching, and legal document analysis using deep contextual representations and various attention mechanisms. |
| Outcome: | The proposed system performs legal consulting, multi-way law searching, and legal document analysis by exploiting techniques such as deep contextual representations and various attention mechanisms. |
WeCheck: Strong Factual Consistency Checker via Weakly Supervised Learning (2023.acl-long)
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| Challenge: | Existing factual consistency metrics are often uncontrollably generating text that is factually inconsistent with inputs. |
| Approach: | They propose a weakly supervised framework that is directly trained on actual generated samples from language models with weakly annotated labels. |
| Outcome: | The proposed framework improves on the TRUE benchmark by 3.3% over existing methods with 435M parameters. |
Bend but Don’t Break? Multi-Challenge Stress Test for QA Models (D19-58)
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| Challenge: | a gap remains in reasoning ability compared to a human, and performance tends to degrade when models are exposed to less-constrained tasks. |
| Approach: | They conduct extensive qualitative and quantitative analyses on the results of four models across four datasets . they relate common errors to model capabilities and discuss a way forward . |
| Outcome: | The proposed model performance is based on the results of four models across four datasets. |
Multi-VQG: Generating Engaging Questions for Multiple Images (2022.emnlp-main)
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| Challenge: | Traditional visual question generation (VQG) focuses on single images, resulting in a limited ability to comprehend time-series information of the underlying event. |
| Approach: | They propose to generate engaging questions from multiple images using a visual question generation dataset and establish a series of baselines. |
| Outcome: | The proposed model builds stories behind the image sequence to allow for creativity and experience sharing and hence draw attention to downstream applications. |
Fluent Response Generation for Conversational Question Answering (2020.acl-main)
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| Challenge: | Question answering (QA) is an important aspect of open-domain conversational agents, garnering specific research focus in the conversational QA subtask. |
| Approach: | They propose a method for situating QA responses within a SEQ2SEQ NLG approach to generate fluent grammatical answer responses while maintaining correctness. |
| Outcome: | The proposed model outperforms baseline CoQA and QuAC models in generating conversational responses. |
Tomayto, Tomahto. Beyond Token-level Answer Equivalence for Question Answering Evaluation (2022.emnlp-main)
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| Challenge: | despite the importance of question answering, evaluations of QA systems are typically limited by manual annotations . despite this, little progress has been made in QA evaluations based on a single answer . |
| Approach: | They propose to extend over exact match (EM) with predefined rules or token-level F1 measure . they propose to use a BERT matching measure to approximate QA predictions . |
| Outcome: | The proposed model improves AE approximations and more accurately reflects the performance of systems. |
Unveiling Divergent Inductive Biases of LLMs on Temporal Data (2024.naacl-short)
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| Challenge: | Temporal relations play a crucial role across diverse applications, including event summarization, predicting future events and medical information processing. |
| Approach: | They evaluate the performance of large language models in the analysis of temporal data using two prompt types, Question Answering and Textual Entailment. |
| Outcome: | The proposed models show that they are biased towards specific temporal relationships, while GPT-3.5 prefers “AFTER” for implicit and explicit events, while TE models lean towards “BEFORE”. |
Did Aristotle Use a Laptop? A Question Answering Benchmark with Implicit Reasoning Strategies (2021.tacl-1)
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| Challenge: | Existing questions that explicitly describe the process for deriving the answer are often implicit. |
| Approach: | They propose a question answering benchmark where the required reasoning steps are implicit in the question and should be inferred using a strategy. |
| Outcome: | The proposed model is short, topic-diverse, and covers a wide range of strategies. |
Let Me Know What to Ask: Interrogative-Word-Aware Question Generation (D19-58)
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| Challenge: | Existing models focus on generating questions based on text and the answer to the generated question. |
| Approach: | They propose a pipelined system that predicts the type of interrogative word to be generated . they also propose qg models that can be used to generate questions based on text . |
| Outcome: | The proposed system improves on the task of QG in SQuAD, improving from 46.58 to 47.69 in BLEU-1, 17.55 to 18.53 in blu-4, 21.24 to 22.33 in METEOR, and 44.53 to 46.94 in ROUGE-L. |
PeerQA: A Scientific Question Answering Dataset from Peer Reviews (2025.naacl-long)
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| Challenge: | a dataset of 579 QA pairs from 208 scientific articles contains answers that reviewers raised while thoroughly examining the scientific article. |
| Approach: | They propose a dataset that contains questions that reviewers raised while thoroughly examining the scientific article. |
| Outcome: | The proposed dataset contains 579 QA pairs from 208 academic articles . the results show that decontextualization approaches improve retrieval performance . |
Gradient-based Analysis of NLP Models is Manipulable (2020.findings-emnlp)
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| Challenge: | Recent work has shown that explanation techniques can be unstable and can be manipulated to hide the actual reasoning behind the predictions of NLP models. |
| Approach: | They propose to merge a BERT-based sentiment classifier with a Facade Model that overwhelms the gradients without affecting the predictions. |
| Outcome: | The proposed model overwhelms the gradients without affecting the predictions on a variety of NLP tasks, such as sentiment analysis, NLI, and QA. |
Generalizing Question Answering System with Pre-trained Language Model Fine-tuning (D19-58)
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| Challenge: | Existing methods focus on improving in-domain performance, leaving open the question of how they can generalize to out-of-domain and unseen RC tasks. |
| Approach: | They propose a multi-task learning framework that learns the shared representation across different tasks and builds on a large pre-trained language model and fine-tuned on multiple RC datasets. |
| Outcome: | The proposed framework improves the BERT-Large baseline by 8.39 and 7.22 respectively. |
FreebaseQA: A New Factoid QA Data Set Matching Trivia-Style Question-Answer Pairs with Freebase (N19-1)
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| Challenge: | Using FreebaseQA, we can generate over 54K matches from about 28K unique questions with minimal cost. |
| Approach: | They propose a data set for open-domain factoid question answering tasks over structured knowledge bases, like Freebase, using a combination of trivia-type question-answer pairs and subject-predicate-object triples. |
| Outcome: | The proposed data set generates 54K matches from 28K unique questions with minimal cost. |
AIT-QA: Question Answering Dataset over Complex Tables in the Airline Industry (2022.naacl-industry)
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Yannis Katsis, Saneem Chemmengath, Vishwajeet Kumar, Samarth Bharadwaj, Mustafa Canim, Michael Glass, Alfio Gliozzo, Feifei Pan, Jaydeep Sen, Karthik Sankaranarayanan, Soumen Chakrabarti
| Challenge: | Table Question Answering (Table QA) systems have been shown to be highly accurate when trained and tested on open-domain datasets built on top of Wikipedia tables. |
| Approach: | They propose a domain-specific Table QA test dataset to test Table Question Answering systems on open-domain datasets built on top of Wikipedia tables. |
| Outcome: | The proposed methods are highly accurate when tested on open-domain datasets built on top of Wikipedia tables. |
Fantastic Questions and Where to Find Them: FairytaleQA – An Authentic Dataset for Narrative Comprehension (2022.acl-long)
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Ying Xu, Dakuo Wang, Mo Yu, Daniel Ritchie, Bingsheng Yao, Tongshuang Wu, Zheng Zhang, Toby Li, Nora Bradford, Branda Sun, Tran Hoang, Yisi Sang, Yufang Hou, Xiaojuan Ma, Diyi Yang, Nanyun Peng, Zhou Yu, Mark Warschauer
| Challenge: | Existing QA datasets rarely distinguish fine-grained reading skills, such as the understanding of varying narrative elements. |
| Approach: | They propose to use FairytaleQA to generate 10,580 questions based on 278 children-friendly stories to assess model's fine-grained learning skills. |
| Outcome: | The proposed dataset consists of 10,580 questions derived from 278 children-friendly stories, covering seven types of narrative elements or relations. |
Entailment Tree Explanations via Iterative Retrieval-Generation Reasoner (2022.findings-naacl)
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Danilo Neves Ribeiro, Shen Wang, Xiaofei Ma, Rui Dong, Xiaokai Wei, Henghui Zhu, Xinchi Chen, Peng Xu, Zhiheng Huang, Andrew Arnold, Dan Roth
| Challenge: | Large language models have achieved high performance on various natural language benchmarks, but the explainability of their output remains elusive. |
| Approach: | They propose an architecture called iterative retrieval-generation reasoner that generates an entailment tree that explains a given hypothesis by using premises from C. |
| Outcome: | The proposed model outperforms existing benchmarks on premise retrieval and entailment tree generation with around 300% gain in overall correctness. |
Reinforced Question Rewriting for Conversational Question Answering (2022.emnlp-industry)
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| Challenge: | Existing approaches to CQA involve training new models from scratch . existing approaches are expensive and often not feasible . |
| Approach: | They propose to use QA feedback to supervise the rewriting model with reinforcement learning. |
| Outcome: | The proposed model can improve QA performance over baselines for extractive and retrieval QA. |
Hybrid Graphs for Table-and-Text based Question Answering using LLMs (2025.naacl-long)
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| Challenge: | Current methods for QA rely on fine-tuning and high-quality data, which is difficult to obtain. |
| Approach: | They propose a Hybrid Graph-based approach for Table-Text QA that leverages Large Language Models without fine-tuning. |
| Outcome: | The proposed approach improves Exact Match scores by 10% on Hybrid-QA and 5.4% on OTT-QA. |
Do Video Language Models really understand the video contexts? (2025.naacl-srw)
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| Challenge: | Recent advances in VideoQA performance have shown that visual language models are effective but the processes of understanding and reasoning in VLMs remain under-explored. |
| Approach: | They propose a framework that incorporates a fine-grained question generation and answering process to measure how well VLMs understand video question answering tasks. |
| Outcome: | The proposed framework incorporates a fine-grained question generation and answering process to measure how well the responses generated by VLMs align with what the model understands. |
Incorporating Question Answering-Based Signals into Abstractive Summarization via Salient Span Selection (2023.eacl-main)
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| Challenge: | Existing methods for generating summarizations using QA-based supervision produce higher quality summaries than baseline methods. |
| Approach: | They propose a method for incorporating question-answering signals into a summarization model by automatically marking document NPs as salient based on whether they are answered in the gold summaries. |
| Outcome: | The proposed method generates higher-quality summaries than baseline methods on benchmark summarization datasets. |
Zero-shot Event Extraction via Transfer Learning: Challenges and Insights (2021.acl-short)
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| Challenge: | Existing methods for event extraction require expensive annotation and are not extensible to new event ontologies. |
| Approach: | They propose to use textual entailment and/or question answering queries to extract a zero-shot event from a set of TE and/ or QA queries. |
| Outcome: | The proposed method achieves acceptable results on ACE-2005 and ERE, but there is still a large gap from supervised approaches. |
Open-Domain Question Answering Goes Conversational via Question Rewriting (2021.naacl-main)
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Raviteja Anantha, Svitlana Vakulenko, Zhucheng Tu, Shayne Longpre, Stephen Pulman, Srinivas Chappidi
| Challenge: | Existing large-scale benchmarks for conversational QA limit the topic of conversation to the content of a single document. |
| Approach: | They propose a dataset for Question Rewriting in Conversational Context (QReCC) the dataset contains 14K conversations with 80K question-answer pairs. |
| Outcome: | The proposed approach shows that the first baseline for the QReCC dataset is 19.10, compared to the human upper bound of 75.45, indicating the difficulty of the setup and a large room for improvement. |
Ai2 Scholar QA: Organized Literature Synthesis with Attribution (2025.acl-demo)
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Amanpreet Singh, Joseph Chee Chang, Dany Haddad, Aakanksha Naik, Jena D. Hwang, Rodney Kinney, Daniel S Weld, Doug Downey, Sergey Feldman
| Challenge: | Ai2 Scholar QA is a free online scientific question answering application . it uses retrieval-augmented generation to answer complex scientific questions . many of these systems are expensive to use and closed-source . |
| Approach: | They propose a retrieval-augmented generation-based scientific question answering application . it uses a Python package and an interactive web app to make the entire pipeline public . they compare it with other similar question-answering applications . |
| Outcome: | The proposed system outperforms other systems on a recent scientific QA benchmark. |
Event Extraction by Answering (Almost) Natural Questions (2020.emnlp-main)
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| Challenge: | Existing work in event argument extraction relies heavily on entity recognition as a preprocessing/concurrent step, causing error propagation. |
| Approach: | They propose a question answering task that extracts event arguments in an end-to-end manner. |
| Outcome: | The proposed framework outperforms prior work on the ACE 2005 task on event argument extraction. |
Ranking Paragraphs for Improving Answer Recall in Open-Domain Question Answering (D18-1)
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| Challenge: | Recent work has combined open-domain question answering with machine comprehension models to find answers in a large knowledge source. |
| Approach: | They propose a machine comprehension model that ranks paragraphs of retrieved documents for a higher answer recall with less noise. |
| Outcome: | The proposed model improves on four open-domain QA datasets by 7.8% on average. |
Russian Jeopardy! Data Set for Question-Answering Systems (2022.lrec-1)
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| Challenge: | Question answering is one of the most common tasks in natural language processing . open-domain questions cover a wide range of topics and do not necessarily come in form of an actual question. |
| Approach: | They describe a Russian question-like question set collected from the Russian analogue of Jeopardy! They observe its linguistic features and the related QA-task. |
| Outcome: | The proposed data set includes 379,284 quiz-like questions with 29,375 from the Russian analogue of Jeopardy! |
TellMeWhy: A Dataset for Answering Why-Questions in Narratives (2021.findings-acl)
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| Challenge: | Existing models do not have the ability to answer "why" questions that require commonsense knowledge external to the narrative. |
| Approach: | They propose a crowd-sourced dataset that asks why characters perform actions . they show that state-of-the-art models are far below human performance on answering such questions . |
| Outcome: | The proposed dataset shows that state-of-the-art models are far below human performance on answering such questions. |
How Well Do Multi-hop Reading Comprehension Models Understand Date Information? (2022.aacl-short)
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| Challenge: | Existing multi-hop reading comprehension datasets have reasoning shortcuts that can be used to answer comparison questions without performing multi- hop reasoning. |
| Approach: | They propose a dataset with three probing tasks in addition to the main question . they then evaluate the model's ability to understand date information . |
| Outcome: | The proposed model performs well in date comparison and number subtraction tasks. |
Revisiting Evaluation of Question Answering Systems in Low-Resource Indic Languages: Bridging Human and Metric Alignment (2026.acl-short)
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| Challenge: | Evaluating Question Answering systems in low-resource Indic languages remains challenging due to the scarcity of annotated data and the lack of reliable evaluation metrics. |
| Approach: | They propose a language-based multi-aspect evaluation framework for question answering systems . the framework integrates semantic similarity, factual completeness, numerical accuracy and contextual relevance . |
| Outcome: | The proposed metric is evaluated across eight Indic-language QA tasks using multiple LLMs . Across all settings, it shows stronger agreement with human evaluation . |
SMARTCAL: An Approach to Self-Aware Tool-Use Evaluation and Calibration (2024.emnlp-industry)
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| Challenge: | Large Language Models (LLMs) have a profound impact on a wide range of applications. |
| Approach: | They propose a framework to mitigate the tool-abuse behavior of Large Language Models and propose SMARTCAL to mitigate this issue. |
| Outcome: | The proposed framework improves the performance of LLMs on three datasets with two mainstream tool-use frameworks and shows an 8.6% increase in QA performance and 21.6 percent lower expected calibration error (ECE) than existing methods. |
DelucionQA: Detecting Hallucinations in Domain-specific Question Answering (2023.findings-emnlp)
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Mobashir Sadat, Zhengyu Zhou, Lukas Lange, Jun Araki, Arsalan Gundroo, Bingqing Wang, Rakesh Menon, Md Parvez, Zhe Feng
| Challenge: | Hallucination is a well-known phenomenon in text generated by large language models . state-of-the-art LLMs still have a number of weaknesses, including the tendency to generate hallucinatory statements without considering the factuality . |
| Approach: | They propose a dataset that captures hallucinations made by retrieval-augmented LLMs . they propose to use these methods to help detect hallucinosity in QA tasks . |
| Outcome: | The proposed method captures hallucinations made by retrieval-augmented LLMs for QA tasks. |
Context Generation Improves Open Domain Question Answering (2023.findings-eacl)
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Dan Su, Mostofa Patwary, Shrimai Prabhumoye, Peng Xu, Ryan Prenger, Mohammad Shoeybi, Pascale Fung, Anima Anandkumar, Bryan Catanzaro
| Challenge: | Existing closed-book question answering methods do not fully exploit the parameterized knowledge. |
| Approach: | They propose a closed-book QA framework which uses a coarse-to-fine approach to extract the relevant knowledge and answer a question. |
| Outcome: | The proposed method outperforms open-book QA methods on three QA benchmarks. |
InstructPTS: Instruction-Tuning LLMs for Product Title Summarization (2023.emnlp-industry)
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| Challenge: | E-commerce product catalogs contain billions of items with lengthy titles . this leads to a gap between how customers refer to these unnatural titles - and how they are used . |
| Approach: | They propose a novel approach to product title summarization that uses a fine-tuned instruction strategy to train a highly accurate model. |
| Outcome: | The proposed approach can generate more accurate product title summaries with an improvement of over 14 and 8 BLEU and ROUGE points. |
Natural Context Drift Undermines the Natural Language Understanding of Large Language Models (2025.findings-emnlp)
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| Challenge: | generative Large Language Models (LLMs) are based on natural text evolution . |
| Approach: | They propose a framework for curating naturally evolved variants of reading passages from contemporary QA benchmarks and for analysing LLM performance across a range of semantic similarity scores. |
| Outcome: | The proposed framework evaluates QA datasets and LLMs with publicly available training data. |
From Misleading Queries to Accurate Answers: A Three-Stage Fine-Tuning Method for LLMs (2025.findings-acl)
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| Challenge: | Existing methods focus on correcting the output but overlook the ability of LLMs to detect and correct misleading content in the input itself. |
| Approach: | They propose a three-stage fine-tuning method that improves LLMs' ability to detect and correct misleading information in input queries. |
| Outcome: | The proposed method improves accuracy and factuality of LLM responses while also reducing hallucinations. |
Learning Rich Representation of Keyphrases from Text (2022.findings-naacl)
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| Challenge: | Prior work has referred to extractive (part of document) or abstractive (not part of document). |
| Approach: | They propose to use a new pre-training objective to introduce keyphrases into transformer language models in discriminative and generative settings. |
| Outcome: | The proposed model improves performance in discriminative and generative settings and also improves on named entity recognition, question answering, relation extraction and abstractive summarization tasks. |
Question-Answer Sentence Graph for Joint Modeling Answer Selection (2023.eacl-main)
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| Challenge: | Existing approaches to automate Question Answering (QA) are graph-based and can target large text databases. |
| Approach: | They propose graph-based approaches for Answer Sentence Selection (AS2) . they train and integrate state-of-the-art (SOTA) models for computing scores . |
| Outcome: | The proposed approach outperforms baseline models on academic benchmarks and a real-world dataset on unseen queries. |
Self-Training Large Language Models for Tool-Use Without Demonstrations (2025.findings-naacl)
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| Challenge: | Recent work augmented LLMs with tools to mitigate factual inaccuracies and computational errors. |
| Approach: | They propose a method to synthesise tool-use traces using the LLM itself. |
| Outcome: | The proposed method improves performance on a long-tail knowledge task, but not on other datasets. |
Modeling Multi-hop Question Answering as Single Sequence Prediction (2022.acl-long)
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| Challenge: | Existing generative question answering models that leverage passage retrieval with a pre-trained transformer are not effective for multihop QA. |
| Approach: | They propose a generative approach that explicitly models the reasoning process to resolve the answer for multi-hop questions by encoding cross-passage interactions. |
| Outcome: | The proposed model improves on two multi-hop QA datasets and is interpretable. |
Answering Unanswered Questions through Semantic Reformulations in Spoken QA (2023.acl-industry)
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| Challenge: | Question Answering (QA) is a longstanding NLP task, and voice assistants like Alexa have made Spoken QA ubiquitous. |
| Approach: | They propose a model that uses linguistically-grounded operations to rewrite questions to facilitate answering. |
| Outcome: | The proposed model improves answer rates on 1M unanswered questions from a leading voice assistant. |
E-BERT: Efficient-Yet-Effective Entity Embeddings for BERT (2020.findings-emnlp)
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| Challenge: | Existing methods to enhance BERT with factual knowledge about entities require no additional pretraining and no changes to the encoder itself. |
| Approach: | They propose a way to inject factual knowledge into the pretrained BERT model by aligning Wikipedia2Vec entity vectors with BERT's native wordpiece vector space and feeding the aligned entity vector into BERT as if they were wordpieces. |
| Outcome: | The proposed version outperforms baseline models on unsupervised question answering, supervised relation classification and entity linking tasks. |
Enhancing Financial Table and Text Question Answering with Tabular Graph and Numerical Reasoning (2022.aacl-main)
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| Challenge: | Existing models that learn tabular structures in financial documents do not understand tables and numbers. |
| Approach: | They propose to infuse explicit tabular structures through a graph neural network to improve model's performance in question answering. |
| Outcome: | The proposed model outperforms the baseline model in low-resource settings while outperforming the graph module. |
Beyond English: The Impact of Prompt Translation Strategies across Languages and Tasks in Multilingual LLMs (2025.findings-naacl)
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| Challenge: | Current LLMs are primarily trained on English data but also include data from other languages. |
| Approach: | They propose to use a pre-translation strategy to translate a task prompt into English before inference . they use 'a modular entity' that could be translated into four different languages . |
| Outcome: | The proposed strategies are based on a set of pre-trained data across 35 languages covering both low and high-resource languages. |
Multi-Relational Question Answering from Narratives: Machine Reading and Reasoning in Simulated Worlds (P18-1)
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| Challenge: | Question Answering (QA) has primarily focused on knowledge bases or free text as a source of knowledge. |
| Approach: | They propose a task of multi-relational QA over personal narrative using text worlds . they generate and release a lightweight Python-based framework for easily generating additional worlds and narrative . |
| Outcome: | The proposed framework combines elements of structured QA over knowledge bases and unstructured QA . it generates and analyzes five diverse datasets with dynamic narrative . the framework is lightweight and easy to use . |
Analyzing the Effectiveness of the Underlying Reasoning Tasks in Multi-hop Question Answering (2023.findings-eacl)
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| Challenge: | Existing studies have utilized underlying reasoning (UR) tasks in multi-hop question answering datasets to explain the predicted answers and evaluate models' reasoning abilities. |
| Approach: | They analyze UR tasks in QA datasets to determine their effectiveness . they find that UR task is helpful in preventing reasoning shortcuts . |
| Outcome: | The proposed model improves QA performance, reasoning shortcuts, and robustness on adversarial questions. |
Unsupervised Adaptation of Question Answering Systems via Generative Self-training (2020.emnlp-main)
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| Challenge: | Supervised self-training methods have transformed applied machine learning . however, adapting to target data has received little attention . |
| Approach: | They propose a method to generate synthetic QA pairs for unsupervised self adaptation . they use massive amounts of data to simulate self-supervised tasks . |
| Outcome: | The proposed method improves QA systems significantly by using less data and training computation than existing augmentation approaches. |
Simple and Effective Semi-Supervised Question Answering (N18-2)
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| Challenge: | Existing deep learning systems for extractive Question Answering are limited and expensive to construct. |
| Approach: | They propose a semi-supervised QA system where end user specifies a set of documents and only a few labelled examples. |
| Outcome: | The proposed system achieves 50% F1 score on SQuAD and TriviaQA with very little labeled data. |
SPAGHETTI: Open-Domain Question Answering from Heterogeneous Data Sources with Retrieval and Semantic Parsing (2024.findings-acl)
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| Challenge: | SPAGHETTI: Semantic Parsing Augmented Generation for Hybrid English information from Text Tables and Infoboxes is a hybrid question-answering pipeline . |
| Approach: | They propose a hybrid question-answering pipeline that leverages knowledge from multiple knowledge sources. |
| Outcome: | The proposed approach achieves state-of-the-art on the Compmix dataset with 56.5% exact match rate. |
End-to-End Beam Retrieval for Multi-Hop Question Answering (2024.naacl-long)
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| Challenge: | Existing beam retrieval frameworks for multi-hop question answering were customized for two-hop questions and were poorly supervised. |
| Approach: | They propose an end-to-end beam retrieval framework for multi-hop question answering . they combine an encoder and two classification heads to optimize the retrieval process . |
| Outcome: | The proposed framework improves on MuSiQue-Ans and surpasses all previous retrievers on HotpotQA and achieves 99.9% precision on 2WikiMultiHopQA. |
AfriMed-QA: A Pan-African, Multi-Specialty, Medical Question-Answering Benchmark Dataset (2025.acl-long)
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Charles Nimo, Tobi Olatunji, Abraham Toluwase Owodunni, Tassallah Abdullahi, Emmanuel Ayodele, Mardhiyah Sanni, Ezinwanne C. Aka, Folafunmi Omofoye, Foutse Yuehgoh, Timothy Faniran, Bonaventure F. P. Dossou, Moshood O. Yekini, Jonas Kemp, Katherine A Heller, Jude Chidubem Omeke, Chidi Asuzu Md, Naome A Etori, Aïmérou Ndiaye, Ifeoma Okoh, Evans Doe Ocansey, Wendy Kinara, Michael L. Best, Irfan Essa, Stephen Edward Moore, Chris Fourie, Mercy Nyamewaa Asiedu
| Challenge: | Recent advances in large language models (LLMs) performance on medical multiplechoice question (MCQ) benchmarks have stimulated interest from healthcare providers and patients globally. |
| Approach: | They introduce AfriMed-QA, the first largescale Pan-African English multi-specialty medical Question-Answering (QA) dataset, with 15,000 questions sourced from over 60 medical schools across 16 countries. |
| Outcome: | The proposed model outperforms other models in the medical field and is compared with other models. |
Explainable Multi-hop Verbal Reasoning Through Internal Monologue (2021.naacl-main)
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| Challenge: | Existing state-of-the-art language models do not make intermediate reasoning steps explicit . large pretrained language models such as BERT and RoBERTa have been successfully used in multi-hop reasoning problems . |
| Approach: | They propose to decompose multi-hop reasoning problems into several simple ones and use natural language to guide intermediate reasoning hops. |
| Outcome: | The proposed model can generate subgoals and perform inference in natural language at each reasoning step. |
Robust Question Answering Through Sub-part Alignment (2021.naacl-main)
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| Challenge: | Current textual question answering models fail to generalize to out-of-domain settings. |
| Approach: | They propose to decompose question and context into smaller units and align them to find the answer. |
| Outcome: | The proposed model is more robust than the standard BERT QA model on adversarial and out-of-domain datasets. |
AHP-Powered LLM Reasoning for Multi-Criteria Evaluation of Open-Ended Responses (2024.findings-emnlp)
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| Challenge: | Question answering (QA) tasks have been extensively studied in the field of natural language processing. |
| Approach: | They propose a method that leverages large language models and the analytic hierarchy process to assess open-ended questions. |
| Outcome: | The proposed method more closely aligns with human judgment compared to baselines on four datasets. |
Fusing Context Into Knowledge Graph for Commonsense Question Answering (2021.findings-acl)
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| Challenge: | Existing methods to combine language modeling and knowledge graphs (KG) lack the context to provide a more precise understanding of the concepts. |
| Approach: | They propose to use external entity descriptions to provide contextual information for commonsense question answering models. |
| Outcome: | The proposed model achieves state-of-the-art among non-generative models in OpenBookQA and is the first of its kind in the field. |
DuReadervis: A Chinese Dataset for Open-domain Document Visual Question Answering (2022.findings-acl)
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| Challenge: | Open-domain question answering is a task that requires answering questions based on a collection of document images. |
| Approach: | They propose to use document images to answer questions using layouts and visual features instead of text. |
| Outcome: | The proposed approach reduces human cost and improves scalability of QA systems by incorporating layouts and visual features. |
Mind the Gap: Benchmarking LLM Uncertainty and Calibration with Specialty-Aware Clinical QA and Reasoning-Based Behavioural Features (2026.eacl-long)
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| Challenge: | Reliable uncertainty quantification (UQ) is essential when employing large language models in high-risk domains such as clinical question answering (QA). |
| Approach: | They evaluate uncertainty estimation methods for clinical question answering using eleven clinical specialties and six question types. |
| Outcome: | The proposed method is based on behavioral features derived from reasoning-oriented models and examines conformal prediction as a complementary set-based approach. |
Peek Across: Improving Multi-Document Modeling via Cross-Document Question-Answering (2023.acl-long)
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| Challenge: | Among recent NLP research, multi-document processing is gaining increasing attention due to the need to handle and process an increasing amount of textual data and available documents online. |
| Approach: | They propose to pre-train a generic multi-document model from a cross-document question answering pre-training objective by generating salient sentences from one document and challenging it to recover the sentence from which it was generated. |
| Outcome: | The proposed model outperforms zero-shot GPT-3.5 and GPT-4 in multiple document tasks and generates the correct answer and the salient sentence from a salient document. |
D2S: Document-to-Slide Generation Via Query-Based Text Summarization (2021.naacl-main)
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| Challenge: | Existing research efforts to automate the document-to-slide generation process face a critical challenge: no publicly available dataset for training and benchmarking. |
| Approach: | They propose a dataset SciDuet that gathers papers and their corresponding slides from recent years’ NLP and ML conferences. |
| Outcome: | The proposed system outperforms state-of-the-art summarization baselines on both automated ROUGE metrics and qualitative human evaluation. |
LLMs Cannot (Yet) Match the Specificity and Simplicity of Online Communities in Long Form Question Answering (2024.findings-emnlp)
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| Challenge: | Recent years have positioned Large Language Models (LLMs) as powerful question answering (QA) tools, shifting users away from interacting in communities towards discourse with AI-driven conversational interfaces. |
| Approach: | They propose to use a QA preference dataset to fine-tune and align Large Language Models (LLMs) from more than 7.4 million submissions and 82 million comments from 2008 to 2022 in Reddit’s 15 largest finance communities. |
| Outcome: | The proposed framework improves on the social quality of the data, and the proposed framework is more accurate and more specific. |
Effective QA-Driven Annotation of Predicate–Argument Relations Across Languages (2026.eacl-long)
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| Challenge: | Explicit representations of predicate-argument relations are a cornerstone of natural language understanding. |
| Approach: | They propose a cross-linguistic projection approach that reuses an English QA-SRL parser within a constrained translation and word-alignment pipeline to automatically generate question-answer annotations aligned with target-language predicates. |
| Outcome: | The proposed approach outperforms strong multilingual LLMs in Hebrew, Russian, and French. |
What Question Did You Answer? Refining Contact Center Evaluation Plans via Backward Questions (2026.acl-industry)
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| Challenge: | Recent advances in large Language Models (LMs) offer unprecedented potential for automating QA evaluations . however, capturing organization-specific domain knowledge remains a challenge for cost-efficient language models . |
| Approach: | They propose a diagnostic framework that generates backward questions to distill implicit reasoning from large LMs into explicit evaluation plans. |
| Outcome: | The proposed framework achieves performance improvements on 8 QA questions with gains of 27.8% in Macro F1. |
CondAmbigQA: A Benchmark and Dataset for Conditional Ambiguous Question Answering (2025.emnlp-main)
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| Challenge: | Large language models (LLMs) generate unreliable responses due to their cognitive alignment of context and intent. |
| Approach: | They propose a benchmark to identify possible implicit assumptions in QA questions . they use retrieved Wikipedia fragments to identify interpretations for a given query . |
| Outcome: | The proposed benchmark identifies possible implicit assumptions and improves answer accuracy by 11.75% . retrieved Wikipedia fragments help identify possible interpretations for a given query . |
The TechQA Dataset (2020.acl-main)
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Vittorio Castelli, Rishav Chakravarti, Saswati Dana, Anthony Ferritto, Radu Florian, Martin Franz, Dinesh Garg, Dinesh Khandelwal, Scott McCarley, Michael McCawley, Mohamed Nasr, Lin Pan, Cezar Pendus, John Pitrelli, Saurabh Pujar, Salim Roukos, Andrzej Sakrajda, Avi Sil, Rosario Uceda-Sosa, Todd Ward, Rong Zhang
| Challenge: | TECHQA is a domain-adaptation question answering dataset for the technical support domain. |
| Approach: | They propose a domain-adaptation question-answering dataset for the technical support domain that contains actual questions posed by users on a technical forum . |
| Outcome: | The TECHQA dataset highlights two real-world issues from the automated customer support domain. |
Structural Deep Encoding for Table Question Answering (2025.findings-acl)
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| Challenge: | Tabular data is a common data format, but many models flatten the structure of a table into a sequence of tokens, resulting in computational costs and over-fitting issues. |
| Approach: | They propose to use special tokens to mark rows and columns, structured embeddings, and sparse attention patterns to preserve structural information of tabular data. |
| Outcome: | The proposed models enhance computational efficiency and preserve structural integrity, leading to better overall performance. |
STREAQ: Selective Tiered Routing for Effective and Affordable Contact Center Quality Assurance (2025.emnlp-industry)
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| Challenge: | Traditional manual QA cannot scale to growing volumes, while fully automated evaluation using large language models presents a cost-performance trade-off. |
| Approach: | They propose a two-tier selective routing framework to intelligently route queries between cost-efficient and high-capability models. |
| Outcome: | The proposed model reduces daily costs by 48% while preserving critical performance. |
Towards Mitigating LLM Hallucination via Self Reflection (2023.findings-emnlp)
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| Challenge: | Large language models have shown promise for generative and knowledge-intensive tasks including question-answering (QA) but the practical deployment still faces challenges, notably the issue of “hallucination”, where models generate plausible-sounding but unfaithful or nonsensical information. |
| Approach: | They propose a self-reflection methodology that incorporates knowledge acquisition and answer generation to address the issue of "hallucination" they use a set of LLMs to generate a more accurate and factually accurate answer. |
| Outcome: | The proposed approach improves factuality, consistency, and entailment of the generated answers. |
Can LLMs Reason Like Doctors? Exploring the Limits of Large Language Models in Complex Medical Reasoning (2026.findings-eacl)
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| Challenge: | Large language models (LLMs) have shown remarkable progress in reasoning across multiple domains, but it remains unclear whether their abilities reflect genuine reasoning or sophisticated pattern matching. |
| Approach: | They conduct one of the largest evaluations to date, assessing 77 LLMs . they select three medical question answering (QA) benchmarks targeting reasoning processes . |
| Outcome: | The results highlight the need to improve specific reasoning strategies to better reflect medical decision-making. |
ArT: All-round Thinker for Unsupervised Commonsense Question Answering (2022.coling-1)
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| Challenge: | Existing work on commonsense QA requires labeled training data for its success . existing work relies on large-scale in-domain or out-of-domain labeles or fails to generate knowledge of high quality in a general way. |
| Approach: | They propose an approach to commonsense question-answering (QA) that takes association during knowledge generation. |
| Outcome: | The proposed model outperforms existing models on commonsense QA benchmarks. |
Exploiting Numerical-Contextual Knowledge to Improve Numerical Reasoning in Question Answering (2022.findings-naacl)
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| Challenge: | Existing numerical reasoning models overly rely on parametric knowledge at inference time . previous studies show that understanding numbers in text improves numerical reasoning accuracy . |
| Approach: | They propose a numerical reasoning model that leverages parametric knowledge to alleviate this over-reliance on parametric information. |
| Outcome: | The proposed model improves numerical reasoning accuracy and performance in DROP. |
Supervised and Unsupervised Transfer Learning for Question Answering (N18-1)
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| Challenge: | Several QA scenarios and datasets have been introduced over the past few years. |
| Approach: | They conduct extensive experiments to investigate the transferability of knowledge from a source QA dataset to a target dataset using two QA models. |
| Outcome: | The proposed model outperforms the previous best model on TOEFL listening comprehension test by 7% on target datasets. |
Event Extraction as Question Generation and Answering (2023.acl-short)
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| Challenge: | Recent work on Event Extraction addresses the error propagation issue found in token-based classification approaches. |
| Approach: | They propose a Question Generation (QG) model that generates questions that leverage contextual information instead of fixed templates. |
| Outcome: | The proposed model outperforms all previous single-task-based models on the ACE05 English dataset. |
CMQA: A Dataset of Conditional Question Answering with Multiple-Span Answers (2022.coling-1)
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| Challenge: | Existing QA datasets only contain unconditional and parallel answers . conditional question answering with hierarchical multi-span answers is challenging for the community to solve . |
| Approach: | They propose a conditional question answering task with hierarchical multi-span answers . they propose CMQA, which contains conditional and hierarchic samples . |
| Outcome: | The proposed task can be used to build more reliable and sophisticated QA systems. |
QA Domain Adaptation using Hidden Space Augmentation and Self-Supervised Contrastive Adaptation (2022.emnlp-main)
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| Challenge: | Question answering models often suffer from performance deterioration upon deployment . |
| Approach: | They propose a self-supervised framework called QADA for QA domain adaptation . they propose to augment training QA samples with hidden space augmentation . |
| Outcome: | The proposed framework improves on multiple target datasets over state-of-the-art methods. |
Domain Adaptation for Question Answering via Question Classification (2022.coling-1)
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| Challenge: | Question answering systems often experience performance deterioration upon user-generated questions. |
| Approach: | They propose a question classification framework to help QA domains adapt to different domains. |
| Outcome: | The proposed framework improves on state-of-the-art datasets against multiple datasets. |
Tagging-Augmented Generation: Assisting Language Models in Finding Intricate Knowledge In Long Contexts (2025.emnlp-industry)
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Anwesan Pal, Karen Hovsepian, Tinghao Guo, Mengnan Zhao, Somendra Tripathi, Nikos Kanakaris, George Mihaila, Sumit Nigam
| Challenge: | Recent studies into effective context lengths of flagship large language models (LLMs) have revealed major limitations in effective question answering (QA) and reasoning over long and complex contexts for even the largest and most impressive cadre of models. |
| Approach: | They propose a lightweight data augmentation strategy that boosts LLM performance in long-context scenarios without degrading and altering the integrity and composition of retrieved documents. |
| Outcome: | The proposed strategy boosts performance in long-context scenarios without degrading and altering the integrity and composition of retrieved documents. |
Graph Guided Question Answer Generation for Procedural Question-Answering (2024.eacl-long)
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Hai Pham, Isma Hadji, Xinnuo Xu, Ziedune Degutyte, Jay Rainey, Evangelos Kazakos, Afsaneh Fazly, Georgios Tzimiropoulos, Brais Martinez
| Challenge: | a new method for question-answer generation from procedural text is sub-optimal for training QA models. |
| Approach: | They propose a method for generating exhaustive and high-quality training data from procedural text . they use procedural data to represent each step and the overall flow of the procedure as graphs . |
| Outcome: | The proposed method outperforms existing methods on task-specific question answering tasks. |
Leveraging fine-tuned Large Language Models with LoRA for Effective Claim, Claimer, and Claim Object Detection (2024.eacl-long)
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| Challenge: | Existing work on identifying claims has focused on sentence level, neglecting supplementary attributes such as the claimer and claim object of the claim. |
| Approach: | They propose a novel approach to detect claims using large language models in natural language understanding and text generation. |
| Outcome: | The proposed approach transforms claim, claimer and claim object detection task into QA setting. |
McCrolin: Multi-consistency Cross-lingual Training for Retrieval Question Answering (2024.findings-emnlp)
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Peerat Limkonchotiwat, Wuttikorn Ponwitayarat, Lalita Lowphansirikul, Potsawee Manakul, Can Udomcharoenchaikit, Ekapol Chuangsuwanich, Sarana Nutanong
| Challenge: | Existing approaches struggle with consistency across multiple languages and multi-size input scenarios. |
| Approach: | They propose a cross-lingual training framework that leverages multi-task learning to enhance cross-linguistic consistency and ranking stability. |
| Outcome: | The proposed training framework outperforms competitors on various input sizes and architectures. |
A Neural-Symbolic Approach to Natural Language Understanding (2022.findings-emnlp)
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| Challenge: | Pre-trained language models have enabled deep neural networks to perform natural language understanding tasks, but their performance can drastically deteriorate when logical reasoning is needed. |
| Approach: | They propose a framework for NLU based on analogical reasoning based upon neural processing and logical reasoning using both neural and symbolic processing. |
| Outcome: | The proposed framework outperforms state-of-the-art methods on two NLU tasks, question answering (QA) and natural language inference (NLI). |
Efficient and Robust Question Answering from Minimal Context over Documents (P18-1)
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| Challenge: | Recent work shows that neural QA models are sensitive to adversarial inputs. |
| Approach: | They propose a sentence selector to select the minimal set of sentences to feed into a QA model. |
| Outcome: | The proposed system reduces training time and inference time by up to 13 times . it is comparable to or better than the state-of-the-art on SQuAD, NewsQA, TriviaQA and SQu AD-Open . |
Training Language Models to Generate Text with Citations via Fine-grained Rewards (2024.acl-long)
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| Challenge: | Recent Large Language Models (LLMs) are prone to hallucination and their outputs often contain incorrect or unverifiable claims. |
| Approach: | They propose a training framework using fine-grained rewards to teach LLMs to generate highly supportive and relevant citations while ensuring the correctness of their responses. |
| Outcome: | The proposed training framework outperforms existing methods on QA datasets and surpasses GPT-3.5-turbo on LLaMA-2-7B. |
AutoAct: Automatic Agent Learning from Scratch for QA via Self-Planning (2024.acl-long)
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Shuofei Qiao, Ningyu Zhang, Runnan Fang, Yujie Luo, Wangchunshu Zhou, Yuchen Jiang, Chengfei Lv, Huajun Chen
| Challenge: | Existing language agent systems struggle with costly data reliance and need multiple models for multiple functions. |
| Approach: | They propose an automatic agent learning framework for QA that synthesizes planning trajectories without human intervention. |
| Outcome: | The proposed framework outperforms existing models on question-answering tasks with a division-of-labor strategy. |
LongFaith: Enhancing Long-Context Reasoning in LLMs with Faithful Synthetic Data (2025.findings-acl)
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| Challenge: | Long-context processing ability has emerged as a significant challenge for large language models. |
| Approach: | They propose a pipeline for synthesizing faithful long-context reasoning instruction datasets . they integrate ground truth and citation-based reasoning prompts integrating them . |
| Outcome: | The proposed pipeline eliminates distractions and improves reasoning chains. |
UNIFIEDQA: Crossing Format Boundaries with a Single QA System (2020.findings-emnlp)
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Daniel Khashabi, Sewon Min, Tushar Khot, Ashish Sabharwal, Oyvind Tafjord, Peter Clark, Hannaneh Hajishirzi
| Challenge: | Question answering (QA) tasks have been posed using a variety of formats . a new study aims to develop specialized QA models that can be used to train QA systems . |
| Approach: | They build a pre-trained question answering model that performs well across 19 QA datasets . they argue that format-specialized models can limit the ability to teach reasoning . |
| Outcome: | a new model that trains on QA datasets performs on par with 8 models trained on individual datasets . a single model that trained on UNIFIEDQA performs well on 19 QA data . |
MAFiD: Moving Average Equipped Fusion-in-Decoder for Question Answering over Tabular and Textual Data (2023.findings-eacl)
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| Challenge: | Experimental results show that Transformer-based questions have a "long" hybrid sequence over tabular and textual elements, causing long-range reasoning problems. |
| Approach: | They propose a moving average-equipped fusion-in-decoder to handle long-range reasoning problems . they use FiD and EMA to combine different levels of reasoning . |
| Outcome: | Experimental results show that the proposed model increases exact matching and F1 by 1.1 and 1.7 on the blind test set. |
A Zero-shot and Few-shot Study of Instruction-Finetuned Large Language Models Applied to Clinical and Biomedical Tasks (2024.lrec-main)
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| Challenge: | Large Language Models (LLMs) have enabled advances in the field of natural language processing . however, their application and potential are still underexplored . |
| Approach: | They evaluate four state-of-the-art instruction-tuned Large Language Models on 13 NLP tasks in English. |
| Outcome: | The evaluated models outperform state-of-the-art models on 13 real-world clinical and biomedical NLP tasks in English. |
AnswerFact: Fact Checking in Product Question Answering (2020.emnlp-main)
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| Challenge: | a product-related community question answering platform is widely employed in many E-commerce sites . however, the misinformation in the answers on those platforms poses unprecedented challenges for users to obtain reliable and truthful product information. |
| Approach: | They propose a large scale fact checking dataset from product question answering forums to predict the answer veracity . each answer is accompanied by its veraity label and associated evidence sentences . |
| Outcome: | The proposed model outperforms baselines on the question veracity prediction task. |
Program Synthesis for Complex QA on Charts via Probabilistic Grammar Based Filtered Iterative Back-Translation (2023.findings-eacl)
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Shabbirhussain Bhaisaheb, Shubham Paliwal, Rajaswa Patil, Manasi Patwardhan, Lovekesh Vig, Gautam Shroff
| Challenge: | Current chart-based Question Answering approaches address structural, visual or simple data retrieval-type questions with fixed-vocabulary answers. |
| Approach: | They employ a neural semantic parser to transform NL questions into SQL programs . they use a probabilistic context-free grammar to generate NL queries from a schema . |
| Outcome: | The proposed approach achieves State-of-the-Art (SOTA) results on reasoning-based queries. |
Guaranteeing Knowledge Integration with Joint Decoding for Retrieval-Augmented Generation (2026.acl-long)
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Zhengyi Zhao, Shubo Zhang, Zezhong Wang, Yuxi Zhang, Huimin Wang, Yutian Zhao, Yefeng Zheng, Binyang Li, Kam-Fai Wong, Xian Wu
| Challenge: | Retrieval-Augmented Generation (RAG) provides access to external knowledge, but current research focuses on retrieval quality and 'integration bottleneck' . |
| Approach: | They propose a framework that explicitly decouples reasoning from evidence integration by generating an 'Inner-Answer' and a 'Refer-Aswer" they propose 'a joint decoding mechanism that dynamically fuses the logical coherence of the Inner-Andswer with the factual precision of the Refer-Adswer at the token level' |
| Outcome: | The proposed framework improves accuracy by 12.1% and reduces hallucinations by 16.3% on five QA benchmarks. |
Query Optimization for Parametric Knowledge Refinement in Retrieval-Augmented Large Language Models (2025.findings-emnlp)
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| Challenge: | Extract-Refine-Retrieve-Read is a query optimization framework for large language models . it is designed to bridge the pre-retrieval information gap in Retriev-Augmented Generation systems . |
| Approach: | They propose a framework to extract parametric knowledge from Large Language Models and refine them using a specialized query optimizer. |
| Outcome: | The extract-refine-retrieve-read framework outperforms baselines on QA datasets . it is designed to meet the knowledge requirements of large language models (LLMs) |
Diverse Multi-Answer Retrieval with Determinantal Point Processes (2022.coling-1)
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| Challenge: | Existing open domain question answering systems provide a single answer to ambiguous questions. |
| Approach: | They propose a re-ranking approach that takes query-passage relevance and passage-passance correlation into account to retrieve passages that are query-relevant and diverse. |
| Outcome: | The proposed method outperforms state-of-the-art on the AmbigQA dataset. |
KoBLEX: Open Legal Question Answering with Multi-hop Reasoning (2025.emnlp-main)
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| Challenge: | Large Language Models (LLMs) have demonstrated remarkable performances in general domains and are now extending into the expert domain of law. |
| Approach: | They propose a Korean Benchmark for Legal EXplainable QA (KoBLEX) that evaluates provision-grounded, multi-hop legal reasoning. |
| Outcome: | The proposed method outperforms baselines and shows a high correlation with human judgments. |
Ask to Learn: A Study on Curiosity-driven Question Generation (2020.coling-main)
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| Challenge: | Existing work on Question Generation focuses on generating relevant questions given text with an answer . human ability to ask questions goes beyond evaluation of reading comprehension . |
| Approach: | They propose a novel text generation task based on a conversational question-asking dataset . they investigate automated metrics to measure different properties of Curious Questions . |
| Outcome: | The proposed task is based on a conversational Question Answering dataset . the results show that humans tend to ask questions with the goal of obtaining new information . |
Ada-LEval: Evaluating long-context LLMs with length-adaptable benchmarks (2024.naacl-long)
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| Challenge: | Existing long-text evaluation benchmarks, such as L-Eval and LongBench, focus on QA and summarization tasks. |
| Approach: | They propose a length-adaptable benchmark for evaluating the long-context understanding of large language models. |
| Outcome: | The proposed benchmarks do not cover ultralong settings (100k+ tokens) and are difficult to evaluate across different length ranges. |
FinRAGBench-V: A Benchmark for Multimodal RAG with Visual Citation in the Financial Domain (2025.emnlp-main)
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| Challenge: | Existing RAG research focuses on textual data, overlooking rich visual content in financial documents. |
| Approach: | They propose a visual RAG benchmark tailored for finance that integrates multimodal data and provides visual citation to ensure traceability. |
| Outcome: | The proposed visual RAG benchmark integrates multimodal data and provides visual citation to ensure traceability. |
Interactive Machine Comprehension with Information Seeking Agents (2020.acl-main)
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| Challenge: | Existing machine reading comprehension (MRC) models do not scale effectively to real-world applications like web-level information retrieval and question answering (QA). |
| Approach: | They propose a method that reframes existing machine reading comprehension (MRC) datasets as interactive, partially observable environments. |
| Outcome: | The proposed method "occludes" the majority of a document’s text and adds context-sensitive commands that reveal "glimpses" of the hidden text to a model. |
Interpretable Proof Generation via Iterative Backward Reasoning (2022.naacl-main)
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| Challenge: | Existing proof generation tasks require reasoning capabilities, but they usually just request for an answer without the reasoning procedure that would make it interpretable. |
| Approach: | They propose an iterative backward reasoning model to solve the proof generation tasks on rule-based Question Answering. |
| Outcome: | The proposed model improves in-domain performance and cross-domain transferability over existing models. |
Towards Improved Multi-Source Attribution for Long-Form Answer Generation (2024.naacl-long)
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| Challenge: | Current LLMs struggle with attribution for long-form answers which require reasoning over multiple evidence sources. |
| Approach: | They propose to improve attribution capability of large language models for long-form answer generation to multiple sources with multiple citations per sentence. |
| Outcome: | The proposed model improves on a wide range of attribution benchmark datasets on PolitiICite, a multi-source attribution dataset based on PolitIcite articles . |
DeepMaven: Deep Question Answering on Long-Distance Movie/TV Show Videos with Multimedia Knowledge Extraction and Synthesis (2023.eacl-main)
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| Challenge: | Long video content understanding poses a challenging set of research questions as it involves long-distance, cross-media reasoning and knowledge awareness. |
| Approach: | They propose a framework which extracts events, entities, and relations from the rich multimedia content in long videos to pre-construct movie knowledge graphs. |
| Outcome: | The proposed framework performs competitively for both the new DeepMovieQA and the pre-existing MovieQA dataset. |
Weakly-Supervised Questions for Zero-Shot Relation Extraction (2023.eacl-main)
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| Challenge: | Zero-Shot Relation Extraction (ZRE) is a task where the training and test sets have no shared relation types. |
| Approach: | They propose to learn a model that can translate relation descriptions into relevant questions, which are then leveraged to generate the correct tail entity. |
| Outcome: | The proposed model outperforms the state-of-the-art on the fewrel and WikiZSL datasets by more than 16 F1 points without using gold question templates. |
Stress Test Evaluation of Transformer-based Models in Natural Language Understanding Tasks (2020.lrec-1)
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| Challenge: | Existing models are weak and take advantage of failures and errors in datasets to improve performance. |
| Approach: | They evaluate three Transformer-based models in Natural Language Inference and Question Answering tasks to see if they are more robust or have the same flaws as their predecessors. |
| Outcome: | The proposed models outperform recurrent neural network models to stress tests on both NLI and QA tasks. |
Think Visually: Question Answering through Virtual Imagery (P18-1)
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| Challenge: | Existing models of geometric reasoning are based on visual representations of objects and objects, but they are not based in symbols or words. |
| Approach: | They propose a new deep network architecture that specializes in answering questions that admit latent visual representations and learns to generate and reason over such representations. |
| Outcome: | The proposed model can generate and reason over latent visual representations and is validated by two synthetic benchmarks. |
Cosmos QA: Machine Reading Comprehension with Contextual Commonsense Reasoning (D19-1)
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| Challenge: | Existing reading comprehension datasets focus on factual and literal understanding of context paragraphs, but our dataset focuses on reading between the lines over a diverse collection of everyday narratives. |
| Approach: | They propose a large-scale dataset that requires commonsense-based reading comprehension, formulated as multiple-choice questions. |
| Outcome: | The proposed architecture improves over the baselines of existing reading comprehension datasets and shows a significant gap between machine (68.4%) and human performance (94%). |
Learning a Cost-Effective Annotation Policy for Question Answering (2020.emnlp-main)
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| Challenge: | State-of-the-art question answering systems require large amounts of training data for which labeling is time consuming and thus expensive. |
| Approach: | They propose a framework for annotating QA datasets that entails learning a cost-effective annotation policy and a semi-supervised annotation scheme. |
| Outcome: | The proposed approach can reduce up to 21.1% of the annotation cost compared with traditional methods . the proposed approach is based on a cost-effective annotation policy and semi-supervised annotation scheme . |
Joint Models for Answer Verification in Question Answering Systems (2021.acl-long)
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| Challenge: | Using a joint approach, we found that the model is more efficient than those developed in machine reading (MR) work. |
| Approach: | They propose a joint model for selecting correct answer sentences among the top k provided by answer sentence selection modules. |
| Outcome: | The proposed model improves on WikiQA, TREC-QA, and a real-world dataset. |
EXIT: Context-Aware Extractive Compression for Enhancing Retrieval-Augmented Generation (2025.findings-acl)
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| Challenge: | Current retrieval-augmented generation systems struggle when retrieval models fail to rank the most relevant documents . existing extractive methods reduce latency but rely on independent, non-adaptive sentence selection . |
| Approach: | They introduce an extractive context compression framework that enhances retrieval-augmented generation in question answering. |
| Outcome: | EXIT surpasses existing compression methods and uncompressed baselines in QA accuracy . the framework reduces inference time and token count while preserving contextual dependencies . |
TAT-QA: A Question Answering Benchmark on a Hybrid of Tabular and Textual Content in Finance (2021.acl-long)
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Fengbin Zhu, Wenqiang Lei, Youcheng Huang, Chao Wang, Shuo Zhang, Jiancheng Lv, Fuli Feng, Tat-Seng Chua
| Challenge: | Existing QA systems focus on unstructured text, structured knowledge base, or semi-structured tables. |
| Approach: | They propose a large-scale question answering model based on financial reports . numerical reasoning is usually required to infer the answer . |
| Outcome: | The proposed model achieves 58.0% inF1, an 11.1% increase over the baseline model, but still lags behind the best human model. |
Mitigating Bias for Question Answering Models by Tracking Bias Influence (2024.naacl-long)
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Mingyu Ma, Jiun-Yu Kao, Arpit Gupta, Yu-Hsiang Lin, Wenbo Zhao, Tagyoung Chung, Wei Wang, Kai-Wei Chang, Nanyun Peng
| Challenge: | Existing literature observes bias in question answering (QA) models, but there is no method to mitigate it. |
| Approach: | They propose an approach to mitigate the bias of question answering models by observing the influence of a query instance on another instance. |
| Outcome: | The proposed method reduces bias level in all 9 bias categories while maintaining comparable QA accuracy. |
MetaQA: Combining Expert Agents for Multi-Skill Question Answering (2023.eacl-main)
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| Challenge: | Recent explosion of question-answering datasets and models has increased interest in generalization of models across multiple domains and formats. |
| Approach: | They propose to combine expert agents with a flexible and training-efficient architecture that considers questions, answer predictions, and answer-prediction confidence scores to select the best answer among a list of answer predictions. |
| Outcome: | The proposed model outperforms previous multi-agent and multi-dataset approaches and is highly data-efficient to train and adaptable to any QA format. |
HotpotQA: A Dataset for Diverse, Explainable Multi-hop Question Answering (D18-1)
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Zhilin Yang, Peng Qi, Saizheng Zhang, Yoshua Bengio, William Cohen, Ruslan Salakhutdinov, Christopher D. Manning
| Challenge: | Existing question answering (QA) datasets fail to train QA systems to perform complex reasoning and provide explanations for answers. |
| Approach: | They propose a new dataset with 113k Wikipedia-based question-answer pairs with four key features: (1) the questions require finding and reasoning over multiple supporting documents to answer; (2) the questions are diverse and not constrained to any pre-existing knowledge bases or knowledge schemas; (3) the questions provide sentence-level supporting facts required for reasoning; and (4) a type of factoid comparison questions to test QA systems’ ability to extract relevant facts and perform necessary comparison. |
| Outcome: | The proposed dataset has 113k Wikipedia-based question-answer pairs and four key features that make it challenging for the latest QA systems. |
GenPoE: Generative Passage-level Mixture of Experts for Knowledge Enhancement of LLMs (2025.findings-emnlp)
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| Challenge: | GenPoE is a passage-level mixture of experts for enhancing knowledge of large language models. |
| Approach: | They propose a novel “generative” passage-level mixture of experts (MoEs) that takes in-context retrieved passages and generates their “expert” parameters. |
| Outcome: | The proposed system is based on a novel hypernetwork which takes in-context retrieved passages and generates their "expert'' parameters. |
ChatGPT Is a Knowledgeable but Inexperienced Solver: An Investigation of Commonsense Problem in Large Language Models (2024.lrec-main)
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| Challenge: | acquiring and representing commonsense in machines has posed a long-standing challenge (Li et al., 2021; Zhang e t al, 2022; Zhou e al. 2023) . |
| Approach: | They use a commonsense-based LLM to evaluate ChatGPT's commonsensing abilities by analyzing 11 datasets and generating knowledge descriptions. |
| Outcome: | The proposed model can achieve good QA accuracies while still struggling with certain domains of datasets. |
Pattern-revising Enhanced Simple Question Answering over Knowledge Bases (C18-1)
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| Challenge: | Simple question answering over knowledge bases is one of the most important natural language processing tasks. |
| Approach: | They propose to conduct pattern extraction and entity linking first and put forward pattern revising procedure to mitigate the error propagation problem. |
| Outcome: | The proposed method outperforms the current state-of-the-art in this task by an absolute large margin. |
Aligning Translation-Specific Understanding to General Understanding in Large Language Models (2024.emnlp-main)
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| Challenge: | Large Language models (LLMs) have remarkable abilities in understanding complex texts . however, understanding misalignment leads to LLMs mistakenly translating complex concepts . |
| Approach: | They propose a translation process that aligns the translation-specific understanding with the general understanding to improve translation quality and reduce translation literalness. |
| Outcome: | The proposed translation process improves translation quality and reduces translation literalness by -25% -51%. |
MMCoQA: Conversational Question Answering over Text, Tables, and Images (2022.acl-long)
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| Challenge: | Existing conversational QA systems only use a single knowledge source, e.g., paragraphs or knowledge graph, and assume it contains enough evidence to extract answers to users' questions. |
| Approach: | They propose a task to answer users' questions with multimodal knowledge sources via multi-turn conversations using a multimodal dataset. |
| Outcome: | The proposed task brings a series of research challenges, including but not limited to priority, consistency, and complementarity of multimodal knowledge. |
Regularization of Distinct Strategies for Unsupervised Question Generation (2020.findings-emnlp)
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| Challenge: | Unsupervised question answering (UQA) is a task of answering questions from a context that contains the answer. |
| Approach: | They propose a method to generate higher-quality questions with a teacher-student architecture and a regularization module to avoid bias toward a particular question generation strategy. |
| Outcome: | The proposed method generates higher-quality questions across diverse datasets and tasks and can be used to create a model with few-shot learning. |
Improving Health Question Answering with Reliable and Time-Aware Evidence Retrieval (2024.findings-naacl)
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| Challenge: | Existing question answering systems rely on pre-selected and annotated evidence documents, thus making them inadequate for addressing novel questions. |
| Approach: | They propose to use the common retrieve-then-read QA pipeline and PubMed as a trustworthy collection of medical research documents to answer health questions from three diverse datasets. |
| Outcome: | The proposed approach improves the macro F1 score by 10% by utilizing the common retrieve-then-read QA pipeline and PubMed as a trustworthy collection of medical research documents. |
NGQA: A Nutritional Graph Question Answering Benchmark for Personalized Health-aware Nutritional Reasoning (2025.acl-long)
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Zheyuan Zhang, Yiyang Li, Nhi Ha Lan Le, Zehong Wang, Tianyi Ma, Vincent Galassi, Keerthiram Murugesan, Nuno Moniz, Werner Geyer, Nitesh V Chawla, Chuxu Zhang, Yanfang Ye
| Challenge: | Diet plays a critical role in human health, but tailoring dietary reasoning to individual health conditions remains a challenge. |
| Approach: | a new benchmark evaluates dietary reasoning using a national health survey data set. |
| Outcome: | The NGQA benchmark evaluates dietary reasoning across three tasks using a set of question complexity settings and baseline models. |
VoiceTextBlender: Augmenting Large Language Models with Speech Capabilities via Single-Stage Joint Speech-Text Supervised Fine-Tuning (2025.naacl-long)
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Yifan Peng, Krishna C Puvvada, Zhehuai Chen, Piotr Zelasko, He Huang, Kunal Dhawan, Ke Hu, Shinji Watanabe, Jagadeesh Balam, Boris Ginsburg
| Challenge: | Recent studies have augmented large language models (LLMs) with speech capabilities, leading to the development of speech language models. |
| Approach: | They propose a single-stage joint speech-text SFT approach for training SpeechLMs . their model combines text-only SFT data with three types of speech-related data . |
| Outcome: | The proposed model outperforms previous SpeechLMs on speech-based QA tasks while maintaining original speech-only capabilities. |
FiD-Ex: Improving Sequence-to-Sequence Models for Extractive Rationale Generation (2021.emnlp-main)
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| Challenge: | Pre-trained sequence to sequence models are effective in making and generating NL explanations, but they have many shortcomings. |
| Approach: | They propose a model that uses sentence markers to eliminate explanation fabrication . they use fusion-in-decoder architecture to handle long input contexts . |
| Outcome: | The proposed model significantly improves on the ERASER explainability benchmark. |
BRIEF: Bridging Retrieval and Inference for Multi-hop Reasoning via Compression (2025.findings-naacl)
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| Challenge: | Existing approaches to augment language models with external knowledge but they are limited by static nature of pre-training data. |
| Approach: | They propose a lightweight approach that compresses retrieved documents into highly dense textual summaries to integrate into in-context RAG. |
| Outcome: | The proposed approach reduces latency and costs while achieving high performance in open-domain questions. |
Which Linguist Invented the Lightbulb? Presupposition Verification for Question-Answering (2021.acl-long)
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| Challenge: | Existing Question-Answering (QA) datasets contain unanswerable questions . however, their treatment in QA systems remains primitive . |
| Approach: | They propose a framework that provides answers based on presupposition failure over oracle behavior of existing QA systems. |
| Outcome: | The proposed system provides responses based on presupposition failure over oracle behavior of existing QA systems. |
Handling Anomalies of Synthetic Questions in Unsupervised Question Answering (2020.coling-main)
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| Challenge: | Existing approaches to improve unsupervised Question Answering (UQA) are expensive and require additional datasets. |
| Approach: | They propose an unsupervised QA approach that generates QA training data automatically. |
| Outcome: | The proposed method improves unsupervised QA significantly across a number of QA tasks. |
Clarify When Necessary: Resolving Ambiguity Through Interaction with LMs (2025.findings-naacl)
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| Challenge: | Ambiguity is embedded throughout natural language, and even simple utterances can have multiple interpretations when read in isolation. |
| Approach: | They propose a task-agnostic framework for evaluating a system’s ability to determine when to ask for clarification. |
| Outcome: | The proposed framework outperforms existing uncertainty estimation approaches at identifying predictions that will benefit from clarification. |
BERT-kNN: Adding a kNN Search Component to Pretrained Language Models for Better QA (2020.findings-emnlp)
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| Challenge: | Pretrained language models (PLMs) capture a diverse range of linguistic and factual knowledge without the use of finetuning. |
| Approach: | They combine BERT with a traditional information retrieval step and a kNN search to improve the recall of facts encountered during training. |
| Outcome: | The proposed approach outperforms baselines on cloze-style QA by large margins without further training. |
Retrieval Helps or Hurts? A Deeper Dive into the Efficacy of Retrieval Augmentation to Language Models (2024.naacl-long)
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| Challenge: | Large language models (LMs) excel in retrieving popular facts, but encounter difficulty with infrequent entity-relation pairs compared to retrievers. |
| Approach: | They propose to use a WiTQA dataset to explore the effects of combinations of entities and relations on LMs. |
| Outcome: | The proposed model can retain popular relations of less common entities while retaining the same popular relations. |
MonoByte: A Pool of Monolingual Byte-level Language Models (2022.coling-1)
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| Challenge: | Existing studies have shown that multilingual models can achieve zero-shot cross-lingual performance on various NLP tasks, but due to the cost of pretraining, they often use public models with limited budgets. |
| Approach: | They propose to use tokenized models to test cross-lingual ability in multilingual and monolingual corpora. |
| Outcome: | The results show that models pretrained on multilingual and even monolingual corpora perform better than models pre-trained on SOTA models. |
UNQOVERing Stereotyping Biases via Underspecified Questions (2020.findings-emnlp)
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| Challenge: | Language embeddings have been shown to have stereotyping biases, but how these biase affecting downstream question answering models remains unexplored. |
| Approach: | They propose a general framework to probe biases through underspecified questions by building minimal context and building minimal questions. |
| Outcome: | The proposed framework isolates two types of reasoning errors and identifies stereotyping biases in gender, nationality, ethnicity, and religion classes. |
ProQA: Structural Prompt-based Pre-training for Unified Question Answering (2022.naacl-main)
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Wanjun Zhong, Yifan Gao, Ning Ding, Yujia Qin, Zhiyuan Liu, Ming Zhou, Jiahai Wang, Jian Yin, Nan Duan
| Challenge: | Existing QA research on question answering is focused on specific question types, knowledge domains, or reasoning skills. |
| Approach: | They propose a unified QA paradigm that solves various tasks through a single model. |
| Outcome: | The proposed model improves QA-centric ability on 11 QA benchmarks. |
Adaptive Retrieval Without Self-Knowledge? Bringing Uncertainty Back Home (2025.acl-long)
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Viktor Moskvoretskii, Maria Marina, Mikhail Salnikov, Nikolay Ivanov, Sergey Pletenev, Daria Galimzianova, Nikita Krayko, Vasily Konovalov, Irina Nikishina, Alexander Panchenko
| Challenge: | Recent adaptive retrieval methods integrate LLMs’ intrinsic knowledge with external information appealing to LLM self-knowledge, but they often neglect efficiency evaluations and comparisons with uncertainty estimation techniques. |
| Approach: | They propose to integrate LLMs’ intrinsic knowledge with external information appealing to LLM self-knowledge but neglect efficiency evaluations and comparisons with uncertainty estimation techniques. |
| Outcome: | The proposed methods outperform complex pipelines in terms of efficiency and self-knowledge while maintaining comparable QA performance. |
FinTextQA: A Dataset for Long-form Financial Question Answering (2024.acl-long)
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| Challenge: | Existing financial question answering datasets lack scope diversity and question complexity. |
| Approach: | They propose to use a dataset for long-form question answering in finance to evaluate QA systems. |
| Outcome: | The proposed dataset includes 1,262 high-quality, source-attributed QA pairs extracted and selected from finance textbooks and government agency websites. |
AdvisorQA: Towards Helpful and Harmless Advice-seeking Question Answering with Collective Intelligence (2025.naacl-long)
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| Challenge: | AdvisorQA aims to improve LLMs’ capability to offer advice for deeply subjective concerns, utilizing the LifeProTips Reddit forum. |
| Approach: | They propose a dataset to train LLMs' ability to offer advice for deeply subjective concerns, utilizing the LifeProTips Reddit forum. |
| Outcome: | The proposed model improves usefulness through automatic metric, GPT-4 and human evaluations, and expands independent evaluation axis to include harmlessness. |
Adapting Meta Knowledge Graph Information for Multi-Hop Reasoning over Few-Shot Relations (D19-1)
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| Challenge: | Existing methods for multi-hop reasoning assume that every relation has enough triples for training . however, performance drops significantly on few-shot relations . |
| Approach: | They propose a meta-based multi-hop reasoning method that learns meta parameters from high-frequency relations that could quickly adapt to few-shot scenarios. |
| Outcome: | The proposed method outperforms state-of-the-art methods in few-shot scenarios on two public datasets from Freebase and NELL. |
Cluster-Former: Clustering-based Sparse Transformer for Question Answering (2021.findings-acl)
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| Challenge: | Existing models for encoding long sequences in deep learning suffer from high latency and memory demands. |
| Approach: | They propose a clustering-based sparse Transformer framework to perform attention across chunked sequences. |
| Outcome: | The proposed framework achieves state-of-the-art on several major QA benchmarks. |
Model Internals-based Answer Attribution for Trustworthy Retrieval-Augmented Generation (2024.emnlp-main)
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| Challenge: | Recent research has shown that self-citing large language models (LLMs) fail to faithfully reflect their context usage throughout the generation process. |
| Approach: | They propose a plug-and-play approach using model internals for faithful answer attribution in RAG applications that detects context-sensitive answer tokens and pairs them with retrieved documents contributing to their prediction. |
| Outcome: | The proposed approach achieves citation quality and efficiency comparable to self-citation while allowing for a finer-grained control of attribution parameters. |
MultiTabQA: Generating Tabular Answers for Multi-Table Question Answering (2023.acl-long)
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| Challenge: | Recent tabular question answering models only answer questions over a single table . multi-table operations often result in tabular outputs . |
| Approach: | They propose a model that answers questions over multiple tables and generalizes to generate tabular answers. |
| Outcome: | The proposed model outperforms state-of-the-art single table QA models on a multi-table QA setting. |
CoCoA: Confidence- and Context-Aware Adaptive Decoding for Resolving Knowledge Conflicts in Large Language Models (2025.emnlp-main)
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| Challenge: | Existing contrastive decoding methods that handle conflict lack adaptability and can degrade performance in low conflict settings. |
| Approach: | They propose a token-level algorithm for principled conflict resolution and enhanced faithfulness that resolves conflict by utilizing confidence-aware measures and the generalized divergence between parametric and contextual distributions. |
| Outcome: | The proposed algorithm achieves 9.2 points on average in QA, summarization, and long-form question answering (LFQA) benchmarks and improves factuality by 2.5 points on the key benchmarks. |
NOAHQA: Numerical Reasoning with Interpretable Graph Question Answering Dataset (2021.findings-emnlp)
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| Challenge: | Existing question answering datasets lack numerical reasoning and reasoning processes . current research on numerical reasoning focuses on simple calculations . |
| Approach: | They propose a conversational and bilingual question answering dataset with numerical reasoning with compound mathematical expressions. |
| Outcome: | The proposed model achieves 55.5 exact match scores while human performance is 89.7. |
K-COMP: Retrieval-Augmented Medical Domain Question Answering With Knowledge-Injected Compressor (2025.naacl-long)
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| Challenge: | Documents retrieved for closed domains require high expertise, so reader model may have difficulty comprehending the text. |
| Approach: | They propose a system which augments the prior knowledge required to answer correctly by adding thousands of tokens to the retrieved documents. |
| Outcome: | The proposed system provides the knowledge required to answer correctly and generates prior knowledge to facilitate the answer process prior to compression of the retrieved passages. |
Inter-Passage Verification for Multi-evidence Multi-answer QA (2025.findings-acl)
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| Challenge: | Existing multi-answer question answering systems struggle to retrieve and synthesize a large number of evidence passages. |
| Approach: | They propose a multi-answer question answering framework that generates a large set of passages and then processes each passage individually to generate an initial high-recall but noisy answer set. |
| Outcome: | The proposed framework outperforms baselines on the QAMPARI and RoMQA datasets, achieving an average F1 score improvement of 11.17%. |
Continuous Language Generative Flow (2021.acl-long)
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| Challenge: | Recent years have witnessed various types of generative models for natural language generation (NLG), especially RNNs or transformers. |
| Approach: | They propose a flow-based language generation model that adapts flow-derived generative models to language generation via continuous input embeddings, adapted affine coupling structures, and a novel architecture for autoregressive text generation. |
| Outcome: | The proposed model improves on QG and NMT and improves performance over baselines on SQuAD and TVQA and NML16. |
pair2vec: Compositional Word-Pair Embeddings for Cross-Sentence Inference (N19-1)
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| Challenge: | Existing inference models that rely heavily on unsupervised single-word embeddings struggle to learn implied relationships between pairs of words. |
| Approach: | They propose to use word embeddings to learn and use background knowledge about implied relationships between words that are crucial for cross-sentence inference problems. |
| Outcome: | The proposed models gain 2.7% on the recently released SQuAD 2.0 and 1.3% on MultiNLI, and 8.8% on the adversarial SQu AD datasets. |
If You Want to Go Far Go Together: Unsupervised Joint Candidate Evidence Retrieval for Multi-hop Question Answering (2021.naacl-main)
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| Challenge: | et al. : evidence retrieval is highly dependent on partial, incorrect or no supporting knowledge. |
| Approach: | They propose a method that retrieves and reranks evidence facts jointly . they propose to account for links between sentences and coverage with the given query . |
| Outcome: | The proposed approach achieves state-of-the-art evidence retrieval performance on two multi-hop question answering datasets. |
Answering Questions by Meta-Reasoning over Multiple Chains of Thought (2023.emnlp-main)
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| Challenge: | Modern systems for multi-hop question answering (QA) break questions into a sequence of reasoning steps, termed chain-of-thought (CoT) Often, multiple chains are sampled and aggregated, but the intermediate steps themselves are discarded. |
| Approach: | They propose a method which prompts large language models to meta-reason over multiple chains of thought rather than aggregate their answers. |
| Outcome: | The proposed approach outperforms baselines on 7 multi-hop QA datasets. |
Zero-Shot Cross-Lingual Transfer with Meta Learning (2020.emnlp-main)
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| Challenge: | There are more than 7,000 languages spoken in the world, over 90 of which have more than 10 million native speakers each. |
| Approach: | They propose to use meta-learning to train a model on multiple languages at the same time . they use standard supervised, zero-shot cross-lingual, and few-shot crosses-lingual settings for different natural language understanding tasks. |
| Outcome: | The proposed setup improves on the state-of-the-art for a total of 15 languages. |
Connecting the Dots: A Knowledgeable Path Generator for Commonsense Question Answering (2020.findings-emnlp)
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| Challenge: | Existing QA systems do not have commonsense knowledge or cannot reason with it. |
| Approach: | They propose to augment a general commonsense QA framework with a knowledgeable path generator by extrapolating existing paths from a KG with 'state-of-the-art' language model. |
| Outcome: | The generated paths are interpretable, novel, and relevant to the task. |
Benchmarking Retrieval-Augmented Generation for Medicine (2024.findings-acl)
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| Challenge: | Large language models (LLMs) have state-of-the-art performance on a wide range of medical question answering tasks, but they still face challenges with hallucinations and outdated knowledge. |
| Approach: | They propose a benchmark to evaluate medical RAG systems using large-scale experiments with over 1.8 trillion prompt tokens. |
| Outcome: | The proposed benchmark improves accuracy of six different LLMs by up to 18% over chain-of-thought prompting. |
On the Influence of Context Size and Model Choice in Retrieval-Augmented Generation Systems (2025.findings-naacl)
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| Challenge: | Retrieval-augmented generation (RAG) is an approach to augment large language models (LLMs) despite their impressive performance, LLMs can generate plausible sounding but factually incorrect responses (hallucinations) |
| Approach: | They propose to use BM25 and semantic search as retrievers to augment large language models by reducing their reliance on static knowledge and improving answer factuality. |
| Outcome: | The proposed approach improves QA performance on a biomedical task with up to 15 snippets but stagnates or declines beyond that. |
Mixture-of-Partitions: Infusing Large Biomedical Knowledge Graphs into BERT (2021.emnlp-main)
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| Challenge: | Infusing factual knowledge into pre-trained models is fundamental for many knowledge-intensive tasks. |
| Approach: | They propose an infusion approach that partitions a large knowledge graph into smaller sub-graphs and infuses their specific knowledge into various BERT models using lightweight adapters. |
| Outcome: | The proposed approach improves the underlying BERTs and achieves new SOTA performance on six downstream tasks. |
What Does Infect Mean to Cardio? Investigating the Role of Clinical Specialty Data in Medical LLMs (2026.eacl-long)
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| Challenge: | S-MedQA is an English question-answering dataset designed for benchmarking large language models in fine-grained clinical specialties. |
| Approach: | They propose to use an English medical question-answering dataset to benchmark large language models in clinical specialties. |
| Outcome: | The proposed dataset is designed to benchmark large language models in medical specialties. |
Aspect-based Sentiment Analysis in Question Answering Forums (2021.findings-emnlp)
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| Challenge: | Existing studies on aspects-based sentiment analysis focus on a single opinionated sentence. |
| Approach: | They propose a model to combine aspects and their sentiments for QA forums . they use cross-sentence aspect-opinion interaction modeling to align the aspect mentioned in the question and associated opinion clues in the answer. |
| Outcome: | The proposed model outperforms baseline models on three real-world datasets. |
Subgraph Retrieval Enhanced Model for Multi-hop Knowledge Base Question Answering (2022.acl-long)
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| Challenge: | Existing retrieval methods for knowledge base question answering are either heuristic or interwoven with the reasoning, causing reasoning on the partial subgraphs. |
| Approach: | They propose a subgraph retrieval framework that decouples the retrieval from the subsequent reasoning process and trains subgraphs for easier reasoning. |
| Outcome: | The proposed framework improves retrieval and QA performance over existing methods. |
Dealing with Data Scarcity in Spoken Question Answering (2024.lrec-main)
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| Challenge: | erroneous automatic speech recognition transcriptions and data scarcity hinder spoken QA models . paper focuses on using limited annotated data to improve spoken qa performance . |
| Approach: | They propose a framework for utilizing limited annotated data effectively to improve spoken QA performance. |
| Outcome: | The proposed model produces question-answer pairs from unannotated data with 5.5% relative gain over the model trained with annotated datasets. |
Iterative Knowledge Graph Refinement and Integration for Medical Question Answering (2026.findings-acl)
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| Challenge: | Existing graph-based RAG methods heuristically retrieve and refine question-relevant subgraphs, potentially introducing redundant and noisy factual information that is difficult for LLMs to process. |
| Approach: | They propose to integrate knowledge graphs (KGs) through retrieval-augmented generation methods to improve LLM reasoning by incorporating external trustworthy knowledge resources. |
| Outcome: | The proposed framework achieves state-of-the-art against baseline competitors on three medical QA benchmark datasets. |
ReadTwice: Reading Very Large Documents with Memories (2021.naacl-main)
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| Challenge: | Existing approaches to model long-range dependencies in text are limited to 512 tokens . however, the amount of compute in attention depends quadratically on the number of tokens in an input text passage. |
| Approach: | They propose a technique that summarises text into a memory table to be used in a second read of the text. |
| Outcome: | The proposed method outperforms models of comparable size on several question answering datasets and sets a new state of the art on the NarrativeQA task, with questions about entire books. |
StepKE: Stepwise Knowledge Editing for Multi-Hop Question Answering (2025.findings-emnlp)
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| Challenge: | Existing knowledge editing methods overlook interplay with pre-existing knowledge, leading to inconsistent edit propagation. |
| Approach: | stepKE integrates edited and existing knowledge for coherent multi-hop reasoning . stepKE decomposes multi-step questions into sequential single-hop sub-questions . |
| Outcome: | Experiments show that StepKE generates more accurate and consistent responses than baselines. |
LINKAGE: Listwise Ranking among Varied-Quality References for Non-Factoid QA Evaluation via LLMs (2024.findings-emnlp)
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| Challenge: | Non-factoid (NF) question answering is challenging to evaluate due to diverse potential answers and no objective criterion. |
| Approach: | They propose a listwise NFQA evaluation approach that uses Large Language Models to rank candidate answers in a descending list of reference answers sorted by descending quality. |
| Outcome: | The proposed method has higher correlations with human annotations than standard methods. |
DeFormer: Decomposing Pre-trained Transformers for Faster Question Answering (2020.acl-main)
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| Challenge: | DeFormer is a transformer-based QA model that uses input-wide self-attention at all layers, causing them to be slow and memory-intensive. |
| Approach: | They propose a transformer which substitutes the full self-attention with question-wide and passage-wide self- attentions in the lower layers. |
| Outcome: | The proposed model can be used to speed up QA by over 4.3x and with simple distillation-based losses they incur only a 1% drop in accuracy. |
SynDARin: Synthesising Datasets for Automated Reasoning in Low-Resource Languages (2025.coling-main)
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| Challenge: | Question Answering datasets are scarce for languages other than English due to the cost and difficulties of collection and manual annotation. |
| Approach: | They propose a method for generating and validating QA datasets for low-resource languages . they use English data as context to generate synthetic multiple-choice (MC) question-answer pairs . |
| Outcome: | The proposed method maintains quality, reduces likelihood of factual errors, and circumvents costly annotation. |
Episodic Memory Reader: Learning What to Remember for Question Answering from Streaming Data (P19-1)
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| Challenge: | Existing QA methods lack scalability and performance is difficult to solve with document-level contexts. |
| Approach: | They propose an end-to-end deep network model that sequentially reads the input contexts into an external memory while replacing memories that are less important for answering unseen questions. |
| Outcome: | The proposed model improves on a synthetic dataset and real-world large-scale textual and video QA datasets. |
Will It Still Be True Tomorrow? Multilingual Evergreen Question Classification to Improve Trustworthy QA (2025.emnlp-main)
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Sergey Pletenev, Maria Marina, Nikolay Ivanov, Daria Galimzianova, Nikita Krayko, Mikhail Salnikov, Vasily Konovalov, Alexander Panchenko, Viktor Moskvoretskii
| Challenge: | Large Language Models (LLMs) often struggle with question answering due to hallucinated answers. |
| Approach: | They propose a multilingual QA dataset with evergreen labels that can be used to evaluate and train large language models. |
| Outcome: | The proposed model performs well on 12 modern LLMs and EG-E5 classifiers. |
Real-Time Open-Domain Question Answering with Dense-Sparse Phrase Index (P19-1)
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| Challenge: | Existing open-domain question answering models require multiple documents on-demand for every input query. |
| Approach: | They propose query-agnostic indexable representations of document phrases that can drastically speed up open-domain question answering. |
| Outcome: | The proposed model can be trained and deployed even in a single 4-GPU server. |
Semi-supervised Training Data Generation for Multilingual Question Answering (L18-1)
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| Challenge: | Existing datasets for question answering (QA) tasks mostly support only English . however, existing resources for these tasks are labor intensive . |
| Approach: | They propose to combine Korean QA datasets with machine-translated English resources to build seed resources. |
| Outcome: | The proposed approach leads to 71.50 F1 on Korean QA (comparable to 77.3 F1) |
G-MAP: General Memory-Augmented Pre-trained Language Model for Domain Tasks (2022.emnlp-main)
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| Challenge: | Existing domain-adaptive pre-training (DAPT) models tend to forget the general knowledge acquired by general PLMs, leading to catastrophic forgetting and sub-optimal performance. |
| Approach: | They propose a framework which augments the domain-specific PLM by a memory built from the frozen general PLM without losing the general knowledge. |
| Outcome: | The proposed framework augments the domain-specific PLM by a memory built from the frozen general PLM without losing the general knowledge. |
Coreference Reasoning in Machine Reading Comprehension (2021.acl-long)
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| Challenge: | Existing datasets for machine reading comprehension do not reflect the natural distribution and, consequently, the challenges of coreference reasoning. |
| Approach: | They propose to use existing coreference resolution datasets to train machine reading comprehension models to better reflect the natural distribution and, consequently, the challenges of coreference reasoning. |
| Outcome: | The proposed method improves the performance of state-of-the-art models on a set of coreference-related datasets. |
Multi-Row, Multi-Span Distant Supervision For Table+Text Question Answering (2023.acl-long)
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Vishwajeet Kumar, Yash Gupta, Saneem Chemmengath, Jaydeep Sen, Soumen Chakrabarti, Samarth Bharadwaj, Feifei Pan
| Challenge: | Existing question answering systems for tables and linked text are relatively unexplored. |
| Approach: | They propose a transformer-based question answering system that copes with distant supervision along both axes of the question and answer. |
| Outcome: | The proposed system beats baselines for HybridQA and OTT-QA with best EM and F1 scores on a held out test set. |
BizBench: A Quantitative Reasoning Benchmark for Business and Finance (2024.acl-long)
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| Challenge: | Answering questions within business and finance requires reasoning, precision, and a wide-breadth of technical knowledge. |
| Approach: | They propose a benchmark for evaluating models’ ability to reason about realistic financial problems by focusing on question-answering over financial data via program synthesis. |
| Outcome: | The proposed benchmark evaluates models' financial background knowledge, ability to parse financial documents, and capacity to solve complex problems with code. |
MultiHiertt: Numerical Reasoning over Multi Hierarchical Tabular and Textual Data (2022.acl-long)
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| Challenge: | Existing benchmarks for numerical reasoning over hybrid data only include a single flat table in each document . |
| Approach: | They propose a new benchmark with QA pairs over multi hierarchical tabular and textual data. |
| Outcome: | The proposed model is more complex and challenging than existing benchmarks and is available on github . it uses facts retrieving to extract relevant facts from both tables and text and symbolic reasoning over retrieved facts. |
Vector-Quantized Input-Contextualized Soft Prompts for Natural Language Understanding (2022.emnlp-main)
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| Challenge: | Prompt Tuning has been successful as a parameter-efficient method of conditioning large-scale pre-trained language models to perform downstream tasks. |
| Approach: | They propose to use a vector-quantized input-contextualized prompt as an extension to the soft prompt tuning framework to learn contextualization of soft prompt tokens. |
| Outcome: | The proposed prompt outperforms soft prompt tuning by an average margin of 1.19% on various language understanding tasks like SuperGLUE, QA, Relation classification, NER and NLI. |
A Nil-Aware Answer Extraction Framework for Question Answering (D18-1)
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| Challenge: | Recent research suggests that reading comprehension-based question answering systems assume that every question has a valid answer in the associated passage. |
| Approach: | They propose a novel nil-aware answer span extraction framework that can return Nil or a text span from the associated passage as an answer in a single step. |
| Outcome: | The proposed framework outperforms baseline approaches on a newsQA dataset. |
Gradient-guided Attention Map Editing: Towards Efficient Contextual Hallucination Mitigation (2025.findings-naacl)
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| Challenge: | Large Language Models (LLMs) often experience “contextual hallucination” where they prioritize self-generated content over input context, leading to a disregard for pertinent details. |
| Approach: | They propose a method that dynamically adjusts attention maps to enhance contextual relevance by using a trained classifier to identify attention maps likely to induce hallucinations. |
| Outcome: | The proposed approach reduces hallucinations across open-source models on summarization and open-book QA tasks. |
Revisiting Large Language Models as Zero-shot Relation Extractors (2023.findings-emnlp)
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| Challenge: | Recent studies show that large language models (LLMs) transfer well to new tasks out-of-the-box . relationship extraction (RE) involves a certain degree of labeled or unlabeled data even under zero-shot setting. |
| Approach: | They propose a simple prompt recursively using LLMs to transform RE inputs to QA format . they propose qq prompting and qt prompting to improve their results . |
| Outcome: | The proposed method improves on different model sizes, benchmarks and settings. |
Learning to Plan for Retrieval-Augmented Large Language Models from Knowledge Graphs (2024.findings-emnlp)
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Junjie Wang, Mingyang Chen, Binbin Hu, Dan Yang, Ziqi Liu, Yue Shen, Peng Wei, Zhiqiang Zhang, Jinjie Gu, Jun Zhou, Jeff Pan, Wen Zhang, Huajun Chen
| Challenge: | Recent studies have attempted to enhance the performance of large language models (LLMs) in complex question-answering (QA) tasks by combining step-wise planning with external retrieval. |
| Approach: | They propose a framework for enhancing LLMs’ planning capabilities by using planning data derived from knowledge graphs (KGs). |
| Outcome: | The proposed framework improves LLMs’ planning capabilities by using knowledge graphs (KGs) the proposed framework is compared with existing frameworks on multiple datasets and shows that it is effective for large language models. |
Safety Alignment in NLP Tasks: Weakly Aligned Summarization as an In-Context Attack (2024.acl-long)
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| Challenge: | Recent developments in balancing usefulness and safety of large language models raise a critical question . current attacks, especially adversarial ones that manipulate malicious prompts, often aim to manipulate the input . |
| Approach: | They show that LLMs can effectively summarize malicious long documents but often refuse to translate them. |
| Outcome: | The findings highlight a vulnerability in LLMs that can't translate or summarize documents . the study focuses on LLM models, Gemini and GPT-4, which can' be exploited . |
DAGN: Discourse-Aware Graph Network for Logical Reasoning (2021.naacl-main)
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| Challenge: | Recent QA with logical reasoning questions requires passage-level relations among the sentences. |
| Approach: | They propose a discourse-aware graph network that aggregates passage-level clues for QA by using discourse-based information. |
| Outcome: | The proposed model achieves competitive results on two logical reasoning QA datasets. |
Empowering cross-lingual abilities of instruction-tuned large language models by translation-following demonstrations (2024.findings-acl)
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| Challenge: | Large Language Models (LLMs) are often unbalanced towards English because of the imbalance in the distribution of pre-training data. |
| Approach: | They propose to empower Instruction-tuned LLMs (It-LLMs) in languages other than English by building semantic alignment between them. |
| Outcome: | The proposed model outperforms the existing model on multilingual question answering benchmarks and adapted versions of MMLU and BBH on six different languages. |
Disentangling Reasoning Capabilities from Language Models with Compositional Reasoning Transformers (2023.findings-acl)
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| Challenge: | ReasonFormer is a unified reasoning framework for complex decision-making . it is based on the dual-process theory of cognitive science, where two cognitive systems interact to form a whole reasoning process. |
| Approach: | They propose a unified reasoning framework that mirrors the modular reasoning process of humans . they decouple the representation module and the reasoning modules to capture different levels of cognition . |
| Outcome: | The proposed framework shows that humans can perform better in complex decision-making tasks. |
Facts Fade Fast: Evaluating Memorization of Outdated Medical Knowledge in Large Language Models (2025.findings-emnlp)
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| Challenge: | LLMs encode extensive knowledge within their parameters, but the knowledge in LLM models can become outdated over time. |
| Approach: | They propose two new LLMs that provide outdated medical advice . they compare the models with a set of QA pairs whose verdict changed through time . |
| Outcome: | The proposed models exhibit memorization of outdated knowledge to some extent. |
Interpretable Question Answering on Knowledge Bases and Text (P19-1)
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| Challenge: | Existing evaluation paradigms for ML based question answering models are lacking . a lack of explanation methods has been proposed for QA models . |
| Approach: | They propose an automatic evaluation paradigm for explanation methods in ML based question answering models . they adapt post hoc explanation methods such as LIME and input perturbation to the model . |
| Outcome: | The proposed evaluation paradigm compares explanation methods with human annotations. |
A Lightweight Method to Generate Unanswerable Questions in English (2023.findings-emnlp)
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| Challenge: | Existing approaches to build robust question answering models are too complex . antonym and entity swaps on answerable questions are used to build models . |
| Approach: | They propose a method for performing antonym and entity swaps on unanswerable questions. |
| Outcome: | The proposed method outperforms the previous state-of-the-art and has higher human-judged relatedness and readability. |
FewshotQA: A simple framework for few-shot learning of question answering tasks using pre-trained text-to-text models (2021.emnlp-main)
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| Challenge: | Existing pre-trained models need fine-tuning on tens of thousands of examples to achieve good results. |
| Approach: | They propose a framework that leverages pre-trained text-to-text models and aligns them with their pre-training framework. |
| Outcome: | The proposed framework outperforms the XLM-Roberta-large on multiple QA benchmarks and is applicable to multilingual situations. |
Efficient and Accurate Contextual Re-Ranking for Knowledge Graph Question Answering (2024.lrec-main)
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Kexuan Sun, Nicolaas Paul Jedema, Karishma Sharma, Ruben Janssen, Jay Pujara, Pedro Szekely, Alessandro Moschitti
| Challenge: | Existing approaches to QA over textual data are based on a "retrieve-then-generate" pipeline. |
| Approach: | They propose a "triple-level" labeling strategy that infers fine-grained labels and trains a re-ranker to improve relevance of retrieved triples. |
| Outcome: | The proposed pipeline improves on prior KGQA systems by 5.56% Exact Match. |
TRACE the Evidence: Constructing Knowledge-Grounded Reasoning Chains for Retrieval-Augmented Generation (2024.findings-emnlp)
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| Challenge: | Existing retrievers are not perfect and often include irrelevant documents in the retrieved set. |
| Approach: | They propose to construct knowledge-grounded reasoning chains from retrieved documents to integrate supporting evidence into RAG models. |
| Outcome: | The proposed model achieves an average performance improvement of 14.03% on three multi-hop QA datasets. |
On the Importance of Diversity in Question Generation for QA (2020.acl-main)
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| Challenge: | In this paper, we show that textual diversity in automatic question generation is beneficial for downstream QA. |
| Approach: | They propose to use textual diversity to promote automatic question generation as a quality measure for QA. |
| Outcome: | The proposed measure of QG quality correlates well with evaluation on QA. |
Table-To-Text generation and pre-training with TabT5 (2022.findings-emnlp)
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| Challenge: | Large language models (LLMs) are limited when it comes to structured or semi-structured domains like tables. |
| Approach: | They propose an encoder-decoder model that generates natural language text based on tables and textual inputs. |
| Outcome: | TabT5 achieves 15% increase in sequence accuracy on spreadsheet formula prediction and data-to-text generation domains. |
Learning to Correct for QA Reasoning with Black-box LLMs (2024.emnlp-main)
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| Challenge: | Existing approaches to improve reasoning capability of large language models rely on accessibility or require significantly increased train- and inference-time costs. |
| Approach: | They propose a method to improve QA reasoning of large language models in a black-box setting by using a trained adaptation model to perform a seq2seq mapping from the often-imperfect reasonings of the original LLM to the correct or improved reasonings. |
| Outcome: | The proposed approach significantly improves reasoning accuracy across various QA benchmarks compared to the best-performing adaptation baselines. |
Transformers to Learn Hierarchical Contexts in Multiparty Dialogue for Span-based Question Answering (2020.acl-main)
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| Challenge: | Existing approaches to embedding in multiparty dialogues are poor for span-based question answering (QA) |
| Approach: | They propose a novel approach to transformers that learns hierarchical representations in multiparty dialogue. |
| Outcome: | The proposed model improves on the FriendsQA dataset by 3.8% and 1.4% over the two state-of-the-art models. |
Question Difficulty Estimation for Large Language Models via Answer Plausibility Scoring (2026.acl-long)
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| Challenge: | Existing approaches to estimate question difficulty rely on readability formulas, retrieval-based signals, or popularity statistics. |
| Approach: | They propose a method that estimates question difficulty by computing the entropy of plausibility scores over candidate answers. |
| Outcome: | The proposed method outperforms baselines across four QA datasets and shows strong robustness across hyperparameter variations and question types. |
Reason first, then respond: Modular Generation for Knowledge-infused Dialogue (2022.findings-emnlp)
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| Challenge: | Large language models can produce fluent dialogue but often hallucinate factual inaccuracies. |
| Approach: | They propose a modular model for incorporating knowledge into conversational agents that generates a knowledge sequence and then attends to its own generated knowledge sequence. |
| Outcome: | The proposed model hallucinates less in knowledge-grounded dialogue tasks and has advantages in terms of interpretability and modularity. |
Towards Better Question Generation in QA-based Event Extraction (2024.findings-acl)
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| Challenge: | True. True. EE aims to extract event-related information from unstructured texts. |
| Approach: | They propose a reinforcement learning method that evaluates the quality of a question and provides clear guidance to QA models. |
| Outcome: | The proposed method generates generalizable, high-quality, and context-dependent questions and provides clear guidance to QA models. |
PEDANTS: Cheap but Effective and Interpretable Answer Equivalence (2024.findings-emnlp)
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| Challenge: | Current short-form QA evaluations lack diverse styles of evaluation data and rely on expensive and slow LLMs. |
| Approach: | They propose a rubric for machine QA that is more stable than an exact match and neural methods. |
| Outcome: | The proposed evaluations improve on the existing short-form QA evaluations using the Trivia community. |
Type-dependent Prompt CycleQAG : Cycle Consistency for Multi-hop Question Generation (2022.coling-1)
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| Challenge: | Existing research on multi-hop question generation (QG) has not been done due to its complexity. |
| Approach: | They propose a type-dependent prompt cycleQAG with a cycle consistency loss . they propose to use the question type and words related to the correct answer as prompts . |
| Outcome: | The proposed model outperforms the baseline model by 10.38% based on ROUGE score. |
Say What You Mean! Large Language Models Speak Too Positively about Negative Commonsense Knowledge (2023.acl-long)
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| Challenge: | Large language models (LLMs) have been studied for their ability to store and utilize positive knowledge. |
| Approach: | They propose to use a constrained keywords-to-sentence generation task and a Boolean question answering task to probe large language models on negative commonsense knowledge. |
| Outcome: | The proposed tasks show that LLMs fail to generate valid sentences grounded in negative commonsense knowledge, yet they can correctly answer yes-or-no questions. |
Momentum Posterior Regularization for Multi-hop Dense Retrieval (2025.coling-main)
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| Challenge: | Current methods for knowledge distillation in one-time retrieval are ineffective for multi-hop QA . posterior information is often defined as the response, which may not connect to the query without intermediate retrieval . |
| Approach: | They propose to distill knowledge from a posterior retrieval into a prior retrieval for multi-hop QA . they propose to use momentum moving average method to update posterior information along with prior retrievals . |
| Outcome: | Experiments on HotpotQA and StrategyQA show that MoPo outperforms baselines in retrieval and downstream QA tasks. |
Into the Unknown Unknowns: Engaged Human Learning through Participation in Language Model Agent Conversations (2024.emnlp-main)
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| Challenge: | Recent advances in language models (LMs) and retrieval-augmented generation (RAG) have led to more capable chatbots and generative search engines. |
| Approach: | They propose to emulate the educational scenario where children/students learn by listening to and participating in conversations of their parents/teachers by watching and steering the discourse among several LM agents. |
| Outcome: | The proposed system outperforms baseline methods on discourse trace and report quality and is preferred by 70% of participants over a search engine and 78% over sabota. |
Do I have the Knowledge to Answer? Investigating Answerability of Knowledge Base Questions (2023.acl-long)
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| Challenge: | missing facts, incomplete schema and limited scope lead to many questions being unanswerable. |
| Approach: | They propose to adapt a KBQA dataset with unanswerable questions to detect missing facts and incomplete schema. |
| Outcome: | The proposed model performs poorly even after adaptation for unanswerable questions. |
Towards Multi-Document Question Answering in Scientific Literature: Pipeline, Dataset, and Evaluation (2025.findings-emnlp)
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| Challenge: | Existing QA systems do not strictly enforce cross-document synthesis or exploit the explicit inter-paper structure that links sources. |
| Approach: | They propose a pipeline methodology for constructing a multi-document academic QA dataset . they detect communities based on citation networks and leverage Large Language Models . |
| Outcome: | The proposed method generates QA pairs related to multi-document content automatically and forms coherent communities based on citation networks and large language models. |
TROVE: A Challenge for Fine-Grained Text Provenance via Source Sentence Tracing and Relationship Classification (2025.acl-long)
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| Challenge: | Large language models have demonstrated great potential in natural language generation, but their widespread adoption has raised concerns regarding content reliability and accountability. |
| Approach: | They propose a challenge to trace each sentence of a target text back to specific source sentences within potentially lengthy or multi-document inputs. |
| Outcome: | The proposed challenge traces each sentence of a target text back to specific source sentences . the dataset includes 11 scenarios covering QA and summarization in english and Chinese . |
AdaCAD: Adaptively Decoding to Balance Conflicts between Contextual and Parametric Knowledge (2025.naacl-long)
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| Challenge: | Existing contrastive methods that ignore the context of a large language model (LLM) fail to handle instances that vary in their amount of conflict, with static methods over-adjusting when conflict is absent. |
| Approach: | They propose a fine-grained, instance-level approach called AdaCAD which dynamically adjusts the degree of conflict based on the degree. |
| Outcome: | The proposed approach outperforms baselines and improves factuality of summaries by 6.19. |
Enhancing Extractive Question Answering in Multiparty Dialogues with Logical Inference Memory Network (2025.coling-main)
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| Challenge: | Existing models for multiparty dialogue question answering (QA) do not consider logical inference relations in multiparty dialogs, leading to suboptimal performance. |
| Approach: | They propose a memory network with logical inference for extractive QA in multiparty dialogues. |
| Outcome: | The proposed model achieves state-of-the-art on Molweni and FriendsQA benchmarks. |
CREPE: Open-Domain Question Answering with False Presuppositions (2023.acl-long)
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| Challenge: | Existing question answering datasets assume all questions have well defined answers. |
| Approach: | They propose a QA dataset containing a distribution of false presuppositions . they find that 25% of questions contain false presumptions . |
| Outcome: | The proposed model finds that 25% of questions contain false presuppositions . the model can find presuffpositions moderately well, but struggle when predicting correctness . |
Social Bias Benchmark for Generation: A Comparison of Generation and QA-Based Evaluations (2025.findings-acl)
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| Challenge: | Existing methods for assessing social bias in large language models (LLMs) do not capture nuanced and context-dependent nature of natural language generation. |
| Approach: | They propose a Bias Benchmark for Generation (BBG) that evaluates social bias in long-form generation by having LLMs generate continuations of story prompts. |
| Outcome: | The proposed benchmark is based on the English BBQ and Korean BBQ datasets and compares it with multiplechoice BBQ evaluation. |
Harvesting and Refining Question-Answer Pairs for Unsupervised QA (2020.acl-main)
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| Challenge: | Recent research attempts to extend unsupervised question answering to settings with few or no labeled data available. |
| Approach: | They propose two approaches to improve unsupervised question answering . first, they harvest lexically and syntactically divergent Wikipedia questions to automatically construct a corpus of question-answer pairs . second, they take advantage of the QA model to extract more appropriate answers . |
| Outcome: | The proposed approach outperforms previous unsupervised approaches by a large margin and is competitive with early supervised models. |
Learning When to Retrieve, What to Rewrite, and How to Respond in Conversational QA (2024.findings-emnlp)
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| Challenge: | Understanding users’ contextual search intent when generating responses is an understudied topic for conversational question answering (QA). |
| Approach: | They propose a method that allows LLMs to decide when to retrieve in RAG settings given a conversational context. |
| Outcome: | The proposed method improves on three conversational QA datasets and criticizes the quality of generated responses. |
Zero-Shot Dialogue State Tracking via Cross-Task Transfer (2021.emnlp-main)
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Zhaojiang Lin, Bing Liu, Andrea Madotto, Seungwhan Moon, Zhenpeng Zhou, Paul Crook, Zhiguang Wang, Zhou Yu, Eunjoon Cho, Rajen Subba, Pascale Fung
| Challenge: | Existing approaches to training a dialogue state tracking model require extensive annotated dialogue data. |
| Approach: | They propose to transfer cross-task knowledge from general question answering corpora to QA model that can handle zero-shot DST. |
| Outcome: | The proposed model improves existing zero-shot and few-shot results on MultiWoz and shows better generalization ability in unseen domains. |
DeCAP: Context-Adaptive Prompt Generation for Debiasing Zero-shot Question Answering in Large Language Models (2025.naacl-long)
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| Challenge: | Existing zero-shot methods for Question Answering (QA) are efficient but fail to consider context and prevent bias propagation in the answers. |
| Approach: | They propose a method for debiasing Large Language Models using context-adaptive prompt generation that takes appropriate debiased actions based on the context and aNeutral Answer Guidance Generation to suppress the LLMs make objective judgments about the context. |
| Outcome: | The proposed method achieves state-of-the-art zero-shot debiased QA performance across eight LLMs. |
Beyond Surface Simplicity: Revealing Hidden Reasoning Attributes for Precise Commonsense Diagnosis (2025.acl-long)
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| Challenge: | Existing commonsense question answering benchmarks often treat these aspects in isolation, resulting in evaluation accuracy differences of up to 24.8% across different difficulty levels. |
| Approach: | They propose a framework that reveals hidden reasoning attributes behind commonsense questions by leveraging the knowledge generated during the reasoning process. |
| Outcome: | The proposed framework reveals hidden reasoning attributes behind commonsense questions by leveraging the knowledge generated during the reasoning process. |
Single Sequence Prediction over Reasoning Graphs for Multi-hop QA (2023.acl-long)
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| Challenge: | Recent generative approaches for multi-hop question answering (QA) use fusion-in-decoder to generate a single sequence output . but, they often have difficulty accurately identifying passages corresponding to key entities in the context . |
| Approach: | They propose a single-sequence prediction method that integrates a graph structure linking key entities in each context passage to relevant subsequent passages for each question. |
| Outcome: | The proposed method improves answer exact-match/F1 scores and faithfulness of grounding on the hotpotQA dataset and achieves state-of-the-art numbers on the Musique dataset. |
Knowledge Transfer from Answer Ranking to Answer Generation (2022.emnlp-main)
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| Challenge: | Recent studies show that Question Answering (QA) based on Answer Sentence Selection (AS2) can be improved by generating an improved answer from the top-k ranked answer sentences. |
| Approach: | They propose to train a GenQA model by transferring knowledge from a trained AS2 model . they use top ranked candidate as the generation target and next k top rated candidates as context . |
| Outcome: | The proposed model outperforms existing models on public and industrial datasets. |
Efficient OpAmp Adaptation for Zoom Attention to Golden Contexts (2025.acl-long)
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| Challenge: | Large language models have shown significant promise in question-answering tasks . noisy reference documents hinder performance of LLMs, causing disproportionate attention to irrelevant content . |
| Approach: | They propose an adaptive large language model that allocates disproportionate attention to irrelevant documents . they use transformers to train the model and integrate it into pre-trained Transformer blocks . |
| Outcome: | The proposed model outperforms state-of-the-art models on noisy-context benchmarks. |
MLQA: Evaluating Cross-lingual Extractive Question Answering (2020.acl-main)
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| Challenge: | Question answering (QA) models have shown rapid progress enabled by the availability of large, high-quality benchmark datasets. |
| Approach: | They present a multi-way aligned extractive QA evaluation benchmark in 7 languages . they evaluate state-of-the-art cross-lingual models and machine-translation-based baselines . |
| Outcome: | The proposed model is based on MLQA, which has over 12K instances in english and 5K in each other language. |
GRAF: Graph Retrieval Augmented by Facts for Romanian Legal Multi-Choice Question Answering (2025.findings-acl)
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| Challenge: | Question answering systems have been used for various domains and languages. |
| Approach: | They propose a novel approach for question answering (QA) that combines a dataset of Romanian legal questions with a CROL corpus of laws. |
| Outcome: | The proposed approach achieves competitive results with generally accepted state-of-the-art methods and even exceeds them in most settings. |
Question-Answering in a Low-resourced Language: Benchmark Dataset and Models for Tigrinya (2023.acl-long)
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| Challenge: | Question-Answering (QA) has seen significant advances in recent years, achieving near human-level performance over some benchmarks. |
| Approach: | They propose to use a native QA dataset for an East African language, Tigrinya, to build similar resources for related languages. |
| Outcome: | The proposed method is applicable to constructing similar resources for related languages. |
Does RAG Introduce Unfairness in LLMs? Evaluating Fairness in Retrieval-Augmented Generation Systems (2025.coling-main)
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| Challenge: | Retrieval-Augmented Generation (RAG) models address fairness concerns with respect to sensitive attributes such as gender, geographic location, and other demographic factors. |
| Approach: | They propose a framework to evaluate fairness in RAG using scenario-based questions and analyzing disparities across demographic attributes. |
| Outcome: | The proposed framework analyzes disparities across demographic attributes and identifies fairness issues in retrieval and generation stages. |
Agent Lumos: Unified and Modular Training for Open-Source Language Agents (2024.acl-long)
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Da Yin, Faeze Brahman, Abhilasha Ravichander, Khyathi Chandu, Kai-Wei Chang, Yejin Choi, Bill Yuchen Lin
| Challenge: | Lumos is a framework for training open-source agents on complex interactive tasks. |
| Approach: | They propose a framework for training open-source LLM-based agents called Lumos . Lumos features a learnable, unified and modular architecture with a planning module that learns high-level subgoal generation and a grounding module trained to translate these into the actions using various tools in the execution module. |
| Outcome: | The framework outperforms open-source agents on QA and web tasks. |
Chat or Learn: a Data-Driven Robust Question-Answering System (2020.lrec-1)
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| Challenge: | QA systems tend to perform poorly at chitchat, while data-driven chatbots are typically user-friendly but not goal-oriented . |
| Approach: | They propose to use a controller to perform dialogue act classification and feed user input either to a sequence-to-sequence chatbot or to QA systems. |
| Outcome: | The proposed system is a spoken QA application for the Google Home smart speaker. |
Automatic Spanish Translation of SQuAD Dataset for Multi-lingual Question Answering (2020.lrec-1)
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| Challenge: | Existing methods to train multilingual QA systems are limited for other languages . cross-lingual learning is a technique that transfers knowledge from source to target language with fewer training data. |
| Approach: | They propose a translation method to translate the Stanford Question Answering Dataset to Spanish and a multilingual-BERT model to train Spanish QA systems. |
| Outcome: | The proposed method outperforms the previous benchmarks for cross-lingual extractive QA. |
Evaluation of Dataset Selection for Pre-Training and Fine-Tuning Transformer Language Models for Clinical Question Answering (2020.lrec-1)
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| Challenge: | Existing work on EHR QA models that learn to answer questions from structured data has focused on analyzing questions or mapping questions to existing NLP based information extraction models. |
| Approach: | They conduct 48 experiments on two clinical question answering datasets . they use open-domain and domain-specific corpora to fine-tune Transformer language models . |
| Outcome: | The proposed models can learn to answer questions from unstructured notes with accuracies up to 90% on open-domain and domain-specific corpora. |
FAITH: Factuality Alignment through Integrating Trustworthiness and Honestness (2026.findings-acl)
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| Challenge: | Existing approaches to correct factually inaccurate outputs are lacking the semantic richness needed to properly understand its internal states of trustworthiness and honesty. |
| Approach: | They propose a framework for factuality alignment that integrates natural-language uncertainty signals with external knowledge and computes confidence scores and semantic entropy from LLM outputs. |
| Outcome: | Extensive experiments on four knowledge-intensive benchmarks show that FAITH improves the factual accuracy and truthfulness of Large Language Models (LLMs). |
SOTOPIA-π: Interactive Learning of Socially Intelligent Language Agents (2024.acl-long)
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Ruiyi Wang, Haofei Yu, Wenxin Zhang, Zhengyang Qi, Maarten Sap, Yonatan Bisk, Graham Neubig, Hao Zhu
| Challenge: | Existing studies on building language agents have not addressed this social learning gap. |
| Approach: | They propose an interactive learning method that improves the social intelligence of language agents by using behavior cloning and self-reinforcement based training on filtered social interaction data. |
| Outcome: | The proposed method allows a 7B LLM to reach the social goal completion ability of an expert model (GPT-4-based agent) without the loss of more generic abilities, such as the ability to answer knowledge-based questions. |
MLEC-QA: A Chinese Multi-Choice Biomedical Question Answering Dataset (2021.emnlp-main)
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| Challenge: | Question Answering (QA) is a branch of QA that enables effective perceiving, accessing, and understanding complex biomedical knowledge by innovative applications. |
| Approach: | They present MLEC-QA, the largest-scale Chinese multi-choice biomedical QA dataset . they implement eight representative control methods and open-domain QA methods as baselines . |
| Outcome: | The proposed dataset is the largest-scale Chinese multi-choice biomedical QA dataset . it covers the following biomedically-relevant sub-fields: Clinic, Stomatology, Public Health, Traditional Chinese Medicine, and Traditional Chinese medicine Combined with Western Medicine. |
VIMQA: A Vietnamese Dataset for Advanced Reasoning and Explainable Multi-hop Question Answering (2022.lrec-1)
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| Challenge: | Existing Vietnamese Question Answering (QA) datasets do not explore the model’s ability to perform advanced reasoning and provide evidence to explain the answer. |
| Approach: | They propose to use Vietnamese as a question-answer dataset with 10,000 Wikipedia-based multi-hop question-and-answ pairs to test model's ability to reason and explain the answer. |
| Outcome: | The proposed dataset is in Vietnamese, a low-resource language. |
CapWAP: Image Captioning with a Purpose (2020.emnlp-main)
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| Challenge: | a traditional image captioning task uses generic reference captions to provide textual information about images. |
| Approach: | They propose a task that uses question-answer pairs to provide visual information instead of generic reference captions. |
| Outcome: | The proposed captioning with a purpose task can be tailored to meet user needs . question-answer pairs are used as a source of supervision for learning visual information needs a new task is proposed . |
SRLGRN: Semantic Role Labeling Graph Reasoning Network (2020.emnlp-main)
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| Challenge: | Existing models that use context and type-matching heuristics do not provide realistic evaluation of reasoning capabilities. |
| Approach: | They propose a graph reasoning network based on the semantic structure of the sentences to learn cross paragraph reasoning paths and find supporting facts and the answer jointly. |
| Outcome: | The proposed network shows competitive performance on the HotpotQA distractor setting benchmark compared to the state-of-the-art models. |
How Robust Are the QA Models for Hybrid Scientific Tabular Data? A Study Using Customized Dataset (2024.lrec-main)
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| Challenge: | Existing tabular QA models are lacking in understanding their robustness on scientific information. |
| Approach: | They propose a dataset to assess the robustness of tabular QA models on scientific hybrid tabular data. |
| Outcome: | The proposed model performs well on scientific tables and text, while the best score is 0.462. |
Context Filtering with Reward Modeling in Question Answering (2025.coling-main)
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| Challenge: | Question Answering (QA) tasks require a mix of relevant and irrelevant information in these contexts to perform well. |
| Approach: | They propose a context filtering approach that removes non-essential details, summarizing crucial content through Reward Modeling. |
| Outcome: | The proposed approach outperforms baseline models in 6.8-folds. |
Do Question Answering Modeling Improvements Hold Across Benchmarks? (2023.acl-long)
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| Challenge: | a new study finds that human-constructed and downsampled benchmarks hold more concurrence than downsampled benchmarks. |
| Approach: | They propose to measure concurrence between two QA benchmarks on a set of 20 models . they find that human-constructed benchmarks have high concurrence amongst themselves . |
| Outcome: | The proposed models hold broadly across the diverse landscape of question answering (QA) benchmarks. |
Return of EM: Entity-driven Answer Set Expansion for QA Evaluation (2025.coling-main)
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| Challenge: | Recent studies show that using large language models (LLMs) is the most reliable method to evaluate QA models, but suffers from limited interpretability, high cost, and environmental harm. |
| Approach: | They propose to use soft exact match (EM) with entity-driven answer set expansion to expand gold answer set to include diverse surface forms. |
| Outcome: | The proposed method outperforms traditional evaluation methods while offering the benefits of high interpretability and reduced environmental harm. |
The Mirage of Model Editing: Revisiting Evaluation in the Wild (2025.acl-long)
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| Challenge: | despite near-perfect results, effectiveness of model editing in real-world applications remains unclear. |
| Approach: | They propose QAEdit and WILD to better reflect real-world use of model editing . they propose a benchmark aligned with widely used question answering datasets and a task-agnostic evaluation framework . |
| Outcome: | The proposed QAEdit benchmark and WILD evaluation framework show that current models perform worse than previously reported. |
SKRAG: A Retrieval-Augmented Generation Framework Guided by Reasoning Skeletons over Knowledge Graphs (2025.findings-emnlp)
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| Challenge: | Existing KG-based question answering frameworks face inefficient subgraph retrieval, limited reasoning capabilities, and high computational costs. |
| Approach: | They propose a Skeleton-guided RAG framework for knowledge graph question answering . SKRAG leverages a lightweight language model enhanced with the Finite State Machine constraint . |
| Outcome: | The proposed framework outperforms baselines and general-domain benchmarks on a KGQA dataset in the space science and utilization domain. |
Contrastive Domain Adaptation for Question Answering using Limited Text Corpora (2021.emnlp-main)
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| Challenge: | Existing question generation methods rely on large amounts of synthetically generated datasets and costly computational resources. |
| Approach: | They propose a framework for domain adaptation that combines question generation and domain-invariant learning to answer out-of-domain questions in settings with limited text corpora. |
| Outcome: | The proposed framework improves on state-of-the-art questions in a domain with limited text corpora. |
DisastQA: A Comprehensive Benchmark for Evaluating Question Answering in Disaster Management (2026.findings-acl)
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Zhitong Chen, Kai Yin, Xiangjue Dong, Chengkai Liu, Xiangpeng Li, Bo Li, Junwei Ma, Yiming Xiao, Ali Mostafavi, James Caverlee
| Challenge: | Existing benchmarks for question answering (QA) are lacking in a high-stakes environment. |
| Approach: | They propose a rigorously verified benchmark of 3,000 expert-annotated questions . they propose 'keypoint-based evaluation protocol' emphasizing factual completeness over verbosity . |
| Outcome: | Experiments with 20 models reveal substantial divergences from general-purpose models such as MMLU-Pro. |
Evaluation Paradigms in Question Answering (2021.emnlp-main)
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| Challenge: | Despite substantial overlap, subtle but significant distinctions exert an outsize influence on research . one paradigm values creating more intelligent QA systems, the other paradigm values building QA system that appeals to users. |
| Approach: | They propose to use the Cranfield and Manchester paradigms to describe research working towards building human-like, intelligent QA systems. |
| Outcome: | The proposed paradigms are based on the findings of two recent studies on question answering (QA) the Cranfield paradigm is not new, but the Manchester paradigm is christened as the most eclectic in QA . |
PubMed Reasoner: Dynamic Reasoning-based Retrieval for Evidence-Grounded Biomedical Question Answering (2026.acl-long)
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| Challenge: | Existing approaches to QA provide inaccurate answers but lack mechanisms to iteratively refine poor queries. |
| Approach: | They propose a biomedical question answering agent that performs self-critic query refinement . they propose re-reflection methods that kick in only after full retrieval is completed . |
| Outcome: | a biomedical question answering agent achieves 78.32% accuracy on PubMedQA . the proposed approach provides practical assistance to clinicians and biomedically researchers . |
NativQA: Multilingual Culturally-Aligned Natural Query for LLMs (2025.findings-acl)
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Md. Arid Hasan, Maram Hasanain, Fatema Ahmad, Sahinur Rahman Laskar, Sunaya Upadhyay, Vrunda N Sukhadia, Mucahid Kutlu, Shammur Absar Chowdhury, Firoj Alam
| Challenge: | Existing frameworks for QA datasets lack regional specificity and cultural specificity. |
| Approach: | They propose a framework to quench native language QA datasets in native languages for LLM evaluation and tuning. |
| Outcome: | The proposed framework is scalable, language-independent and can be used to build culturally and regionally aligned QA datasets in native languages. |
Where am I? Large Language Models Wandering between Semantics and Structures in Long Contexts (2024.emnlp-main)
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| Challenge: | Existing evaluations of the open-domain question answering task focus solely on whether the model provides the correct answer. |
| Approach: | They propose to examine the phenomenon of discrepancies in abilities across two distinct tasks—QA and evidence selection—when performed simultaneously. |
| Outcome: | The proposed framework and resources examines the ability of large language models to perform two distinct tasks simultaneously, from the perspective of task alignment. |
Pre-training Transformer Models with Sentence-Level Objectives for Answer Sentence Selection (2022.emnlp-main)
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| Challenge: | Existing models for answer sentence selection (AS2) are not yet available for AS2 . |
| Approach: | They propose to incorporate paragraph-level semantics within and across documents to improve transformers for AS2 . they propose to use a dataset to predict whether two sentences are extracted from the same paragraph . |
| Outcome: | The proposed model outperforms baseline models on public and industrial datasets on three public and one industrial dataset. |
VoxEval: Benchmarking the Knowledge Understanding Capabilities of End-to-End Spoken Language Models (2025.acl-long)
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| Challenge: | Existing question-answering benchmarks fail to evaluate SLMs’ knowledge understanding due to their inability to support end-to-end speech evaluation and account for varied input audio conditions. |
| Approach: | They propose a new question-answering benchmark that assesses SLMs’ knowledge understanding through pure speech interactions. |
| Outcome: | The proposed benchmark maintains speech format for both inputs and outputs, evaluates model robustness across diverse input audio conditions, and pioneers the assessment of complex tasks like mathematical reasoning in spoken format. |
TASA: Deceiving Question Answering Models by Twin Answer Sentences Attack (2022.emnlp-main)
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| Challenge: | Existing adversarial models rely on keyword matching and ignore relevant contextual relations for answer prediction. |
| Approach: | They propose to use keyword matching to attack model with two biases that rely on a perturbed answer sentence and a distracting answer sentence to misguide model. |
| Outcome: | The proposed method produces fluent and grammatical adversarial contexts while maintaining gold answers. |
On Synthesizing Data for Context Attribution in Question Answering (2025.acl-long)
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Gorjan Radevski, Kiril Gashteovski, Shahbaz Syed, Christopher Malon, Sebastien Nicolas, Chia-Chien Hung, Timo Sztyler, Verena Heußer, Wiem Ben Rim, Masafumi Enomoto, Kunihiro Takeoka, Masafumi Oyamada, Goran Glavaš, Carolin Lawrence
| Challenge: | Large Language Models (LLMs) have a tendency to hallucinate, resulting in false or misleading answers. |
| Approach: | They propose a novel generative strategy for synthesizing context attribution data. |
| Outcome: | The proposed approach is highly effective for fine-tuning small LMs for context attribution in different QA tasks and domains. |
FOCUS: Effective Embedding Initialization for Monolingual Specialization of Multilingual Models (2023.emnlp-main)
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| Challenge: | Multilingual models have been released, but many of the world's languages are not covered. |
| Approach: | They propose a method that initializes the embedding matrix for a new tokenizer based on information in the source model's embeddable matrix. |
| Outcome: | The proposed method outperforms random initialization and previous work on language modeling and on a range of downstream tasks (NLI, QA, and NER). |
Resource-Friendly Dynamic Enhancement Chain for Multi-Hop Question Answering (2025.findings-acl)
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Binquan Ji, Haibo Luo, YifeiLu YifeiLu, Lei Hei, Jiaqi Wang, Tingjing Liao, Wang Lingyu, Shichao Wang, Feiliang Ren
| Challenge: | Existing approaches to solve multi-hop question answering challenges require multiple rounds of retrieval and iterative generation. |
| Approach: | They propose a framework that decomposes complex questions into coherent subquestions . it then iteratively refines these subquests through context-aware rewriting to generate effective query formulations. |
| Outcome: | The proposed framework performs on par with or surpasses state-of-the-art benchmarks while significantly reducing token consumption. |
MedREQAL: Examining Medical Knowledge Recall of Large Language Models via Question Answering (2024.findings-acl)
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| Challenge: | Large language models can encode knowledge during pre-training on large text corpora, enabling downstream tasks like question answering (QA). |
| Approach: | They construct a dataset derived from systematic reviews to examine their ability to encode medical knowledge and their recall. |
| Outcome: | The proposed model performs well on the biomedical QA dataset. |
HetGCoT: Heterogeneous Graph-Enhanced Chain-of-Thought LLM Reasoning for Academic Question Answering (2025.findings-emnlp)
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| Challenge: | graph neural networks capture structured graph information, but lack integration at the reasoning level. |
| Approach: | They propose a framework that leverages graph structural information to reason interpretable academic QA results. |
| Outcome: | The proposed framework outperforms sota baselines on OpenAlex and DBLP datasets. |
Know the Known and the Unknown: Reasonable Answer Generation with Knowledge-Informed Citations (2026.acl-long)
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Yichi Zhang, Zhuo Chen, Lingbing Guo, Jun Xu, Mengshu Sun, Zhizhen Liu, Lei Liang, Wen Zhang, Huajun Chen
| Challenge: | Existing approaches focus on generating multi-level citations linked to specific references, making it verifiable and trustworthy. |
| Approach: | They propose a new data construction pipeline and a benchmark to improve citation granularity and awareness of unknown information. |
| Outcome: | The proposed model improves on the existing benchmark and data construction pipeline and provides citation granularity and awareness of unknown information. |
Measuring Retrieval Complexity in Question Answering Systems (2024.findings-acl)
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| Challenge: | a new metric, retrieval complexity (RC), measures the difficulty of answering questions. |
| Approach: | They propose a retrieval complexity metric conditioned on the completeness of retrieved documents . they propose an unsupervised pipeline to measure RC given an arbitrary retrieval system . |
| Outcome: | The proposed pipeline measures RC more accurately than alternative estimators on six challenging QA benchmarks. |
Language Models with Rationality (2023.emnlp-main)
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| Challenge: | lack of interpretability is a growing impediment to widespread use of large language models . a new approach to solve this problem is to add a rational layer on top of the LLM . |
| Approach: | They propose to add a rational layer to the large language models to make model beliefs explicit . they also propose to identify and minimize contradictions in the model belief graph . |
| Outcome: | a new approach improves consistency without harming overall answer accuracy . the proposed approach makes model beliefs explicit and resolves inconsistencies . |
GRIL: Knowledge Graph Retrieval-Integrated Learning with Large Language Models (2025.findings-emnlp)
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Jialin Chen, Houyu Zhang, Seongjun Yun, Alejandro Mottini, Rex Ying, Xiang Song, Vassilis N. Ioannidis, Zheng Li, Qingjun Cui
| Challenge: | Existing graph RAGs decouple retrieval and reasoning processes, preventing adaptability . existing graph Raggings depend heavily on ground-truth entities, which are often unavailable in open-domain settings. |
| Approach: | They propose a graph retriever that is trained end-to-end with large-scale graphs . structure and semantic features are encoded via soft tokens and the verbalized graph . |
| Outcome: | The proposed approach improves the performance of large-scale graph retrieval models by grounding it with external knowledge. |
XC-Cache: Cross-Attending to Cached Context for Efficient LLM Inference (2024.findings-emnlp)
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Joao Monteiro, Étienne Marcotte, Pierre-Andre Noel, Valentina Zantedeschi, David Vazquez, Nicolas Chapados, Christopher Pal, Perouz Taslakian
| Challenge: | XC-Llama uses pre-trained decoder-only models to condition generation on reference text without the prompt. |
| Approach: | They propose a model that uses cross-attention to condition generation on reference text without the prompt. |
| Outcome: | The proposed models outperform prompt-based inference methods and reduce space footprint relative to standard KV caching by two orders of magnitude. |
Metaphor and Large Language Models: When Surface Features Matter More than Deep Understanding (2025.findings-acl)
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| Challenge: | Existing studies on metaphor processing have focused on single datasets and specific task settings, often using artificially constructed data through lexical replacement. |
| Approach: | They propose to evaluate the capabilities of Large Language Models (LLMs) in metaphor interpretation across multiple datasets, tasks, and prompt configurations. |
| Outcome: | The proposed frameworks are more realistic and efficient than current models and are more efficient than existing models. |
ACCEPT: Adaptive Codebook for Composite and Efficient Prompt Tuning (2024.findings-emnlp)
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| Challenge: | Prompt Tuning has been a popular fine-tuning method for large-scale pretrained language models. |
| Approach: | They propose a method that allows all soft prompts to share a set of learnable codebook vectors in each subspace, with each prompt differentiated by a number of adaptive weights. |
| Outcome: | The proposed method achieves superior performance on 17 diverse natural language tasks including natural language understanding (NLU) and question answering (QA) tasks by tuning only 0.3% of parameters of the PLMs. |
Faster In-Context Learning for LLMs via N-Gram Trie Speculative Decoding (2025.emnlp-main)
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| Challenge: | In-Context Learning (ICL) is a key method in prompt engineering, but its long retrieved contexts and limited token throughput will slow reasoning speeds. |
| Approach: | They propose a method that leverages the overlap between context and model output to generate drafts from the context. |
| Outcome: | The proposed method achieves the highest mean speedup on Vicuna-7B, Llama2-7B-Chat, and Llma3-8B-Instruct tasks. |
LONGAGENT: Achieving Question Answering for 128k-Token-Long Documents through Multi-Agent Collaboration (2024.emnlp-main)
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| Challenge: | Large language models (LLMs) have been successful in understanding language and processing text, but their cost prohibits their practical applications. |
| Approach: | They propose a multi-agent collaboration method that breaks down lengthy documents into smaller, more manageable chunks and organizes the member agents to read their assigned chunks. |
| Outcome: | The proposed method achieves 16.42% and 1.63% accuracy gains over existing models on single-hop and multi-hop QA settings. |
Prompting with Pseudo-Code Instructions (2023.emnlp-main)
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| Challenge: | ambiguity in natural language can hinder performance of large language models. |
| Approach: | They manually create a dataset of pseudo-code prompts for 132 different classification, QA, and generative language tasks, sourced from the Super-NaturalInstructions dataset. |
| Outcome: | The pseudo-code prompts improve the performance of two LLM families, BLOOM and CodeGen. |
MATTER: Memory-Augmented Transformer Using Heterogeneous Knowledge Sources (2024.findings-acl)
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| Challenge: | Existing retrieval-augmented models typically retrieve information from a single type of knowledge source. |
| Approach: | They propose an efficient memory-augmented transformer to retrieve relevant knowledge from multiple knowledge sources. |
| Outcome: | The proposed model outperforms existing retrieval-augmented models on popular QA benchmarks in terms of accuracy and speed. |
StorySparkQA: Expert-Annotated QA Pairs with Real-World Knowledge for Children’s Story-Based Learning (2024.emnlp-main)
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Jiaju Chen, Yuxuan Lu, Shao Zhang, Bingsheng Yao, Yuanzhe Dong, Ying Xu, Yunyao Li, Qianwen Wang, Dakuo Wang, Yuling Sun
| Challenge: | Existing story reading systems fail to capture the nuances of how education experts think when conducting interactive story reading activities. |
| Approach: | They propose to use existing question-answering (QA) datasets to capture experts' annotations and thinking process to construct a story-based annotation framework. |
| Outcome: | The proposed framework captures experts’ annotations and thinking process and can be used to generate 5, 868 expert-annotated QA pairs with real-world knowledge. |
Pardon? Evaluating Conversational Repair in Large Audio-Language Models (2026.findings-acl)
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| Challenge: | Existing evaluations of large audio-language models focus on answer accuracy and robustness to acoustic perturbations, but they assume that inputs remain semantically answerable. |
| Approach: | They propose a repair-aware evaluation setting that explicitly distinguishes between answerable and unanswerable audio inputs. |
| Outcome: | The proposed evaluation setting distinguishes between answerable and unanswerable audio inputs. |
Tailoring Diagnostic Modeling to Individual Learners: Personalized Distractor Generation via MCTS-Guided Reasoning Reconstruction (2026.acl-long)
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| Challenge: | Current distractor generation methods produce shared distractors for all students, ignoring individual variations in reasoning, which limits their diagnostic effectiveness. |
| Approach: | They propose a method which tailors distractors to each student’s specific cognitive flaws, inferred from their past question-answering (QA) history. |
| Outcome: | The proposed framework outperforms existing methods in generating plausible distractors and adapts to group-level settings. |
Hop, Union, Generate: Explainable Multi-hop Reasoning without Rationale Supervision (2023.emnlp-main)
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| Challenge: | Existing methods rely on supervision for both answers and rationales, but they have limited capacities in modeling interactions between sentences, let alone reasoning across multiple documents. |
| Approach: | They propose a principled, probabilistic approach for training explainable multi-hop question answering systems without rationale supervision. |
| Outcome: | The proposed method is more accurate at selecting rationales than previous methods while maintaining similar accuracy in predicting answers. |
Multi-Attribute Steering of Language Models via Targeted Intervention (2025.acl-long)
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| Challenge: | Existing approaches for steering large language models fail to scale to multi-attribute settings with conflicts, such as enhancing helpfulness while also reducing toxicity. |
| Approach: | They propose a steering framework for selective token-level intervention across multiple attributes that enforcing sparsity and orthogonality among vectors for different attributes. |
| Outcome: | The proposed framework outperforms existing ITI and parameter-efficient fine-tuning approaches across question answering tasks and generative tasks. |
Generate-on-Graph: Treat LLM as both Agent and KG for Incomplete Knowledge Graph Question Answering (2024.emnlp-main)
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Yao Xu, Shizhu He, Jiabei Chen, Zihao Wang, Yangqiu Song, Hanghang Tong, Guang Liu, Jun Zhao, Kang Liu
| Challenge: | Existing methods to integrate LLMs with Knowledge Graphs (KGs) however, these methods are often incomplete to cover all the knowledge required to answer questions. |
| Approach: | They propose to integrate LLMs with Knowledge Graphs (KGs) to address insufficient knowledge and hallucination issues in Large Language Models. |
| Outcome: | The proposed method outperforms existing methods on two datasets. |
QADYNAMICS: Training Dynamics-Driven Synthetic QA Diagnostic for Zero-Shot Commonsense Question Answering (2023.findings-emnlp)
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| Challenge: | Existing approaches to QA fine-tune language models on QA pairs constructed from CommonSense Knowledge Bases (CSKBs) however, current QA synthesis protocols introduce noise from the CSKB and generate ungrammatical questions and false negative options, which impede the model’s ability to generalize. |
| Approach: | They propose a framework to analyze the training dynamics of each QA pair at both the question level and option level, discarding machine-detectable artifacts and mislabeled or false-negative options. |
| Outcome: | The proposed framework outperforms baseline approaches while using only 33% of the synthetic data. |
LinkQA: Synthesizing Diverse QA from Multiple Seeds Strongly Linked by Knowledge Points (2026.acl-long)
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| Challenge: | Existing training data is limited in high-quality training data, limiting the ability to produce high-performance LLMs. |
| Approach: | They propose a KP-graph-based synthesis framework that extracts KPs from QA seed data and constructs a graph of KP data from multiple seeds strongly linked by KP. |
| Outcome: | The proposed framework enables flexible control over discipline and difficulty distributions while balancing KP coverage and popularity. |
Don’t Just Listen, Try Planning: Graph-based Retrieval-Generation Agent for Long-form Audio Meeting Understanding (2026.findings-acl)
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| Challenge: | Existing question answering (QA) datasets for long audio meetings suffer from acoustic information loss and poor long-term dependency capture. |
| Approach: | They propose a question answering dataset that captures three core dimensions of long-form audio meeting content. |
| Outcome: | The proposed model captures three core dimensions of long-form audio meeting content: complex semantics, multi-speaker interactions, and quite long timestamps. |
Follow the Flow: Fine-grained Flowchart Attribution with Neurosymbolic Agents (2025.emnlp-main)
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Manan Suri, Puneet Mathur, Nedim Lipka, Franck Dernoncourt, Ryan A. Rossi, Vivek Gupta, Dinesh Manocha
| Challenge: | Flowcharts are a critical tool for visualizing decision-making processes, but their non-linear structure and complex visual-textual relationships make it difficult to interpret them using LLMs. |
| Approach: | They propose a task of Fine-grained Flowchart Attribution to trace components grounding a flowchart referring LLM response. |
| Outcome: | The proposed agent mitigates visual hallucinations in LLM answers over baselines by 10–14% on a FlowExplainBench dataset. |
QA-based Event Start-Points Ordering for Clinical Temporal Relation Annotation (2024.lrec-main)
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| Challenge: | Temporal relation annotation in the clinical domain is crucial but challenging due to its workload and the medical expertise required. |
| Approach: | They propose an annotation method that integrates event start-points ordering and question-answering as the annotation format. |
| Outcome: | The proposed method achieves a 0.72 F1 score and enables collaboration among medical experts and non-experts. |
500xCompressor: Generalized Prompt Compression for Large Language Models (2025.acl-long)
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| Challenge: | Prompt compression is important for large language models to increase inference speed, reduce computation cost, and improve user experience. |
| Approach: | They propose a method that compresses natural language contexts into a special token . they propose to reduce computations and memory costs by reducing the complexity . |
| Outcome: | The proposed method reduces computations and memory costs by 27-90% . it retains 70-74% and 77-84% of the LLM capabilities at high compression ratios . |
RT-VQ2A2: Real Time Vector Quantized Question Answering with ASR (2024.lrec-main)
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| Challenge: | Existing frameworks for QA with large language models are difficult to implement due to noise, limited context length and latency. |
| Approach: | They propose a model-agnostic framework to address problems in QA with large language models. |
| Outcome: | The proposed framework reduces noise in the ASR output and the limited context length of LLMs and improves performance on the widely used Spoken-SQuAD dataset. |
Large Language Models Meet Knowledge Graphs for Question Answering: Synthesis and Opportunities (2025.emnlp-main)
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| Challenge: | Large language models (LLMs) have shown remarkable performance on question-answering tasks due to their superior capabilities in natural language understanding and generation. |
| Approach: | They propose a structured taxonomy that categorizes the methodology of synthesizing LLMs and knowledge graphs for QA according to the categories of QA and the KG’s role when integrating with LLM. |
| Outcome: | The proposed taxonomy categorizes the methods according to the categories of QA and the KG’s role when integrating with LLMs. |
CSTree-SRI: Introspection-Driven Cognitive Semantic Tree for Multi-Turn Question Answering over Extra-Long Contexts (2025.acl-long)
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| Challenge: | Large Language Models (LLMs) have achieved remarkable success in natural language processing (NLP), particularly in single-turn question answering (QA) on short-text. |
| Approach: | They propose a framework that captures logical correlations across chunks of ELC and maintains coherence of multi-turn Questions. |
| Outcome: | The proposed framework is able to capture logical correlations across chunks of ELC and maintain coherence of multi-turn Questions. |
MDBench: A Synthetic Multi-Document Reasoning Benchmark Generated with Knowledge Guidance (2025.findings-acl)
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| Challenge: | Multi-document reasoning is an area of increasing relevance given LLM capabilities in handling longer-context inputs, but few benchmarks exist to rigorously examine model behavior in this setting. |
| Approach: | They propose a new dataset for evaluating LLMs on the task of multi-document reasoning that uses condensed structured seed knowledge to modify it through LLM-assisted edits. |
| Outcome: | The proposed method generates document sets and QA examples on a multi-document reasoning task using a synthetic generation process. |
Breaking Token Into Concepts: Exploring Extreme Compression in Token Representation Via Compositional Shared Semantics (2025.findings-emnlp)
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| Challenge: | Standard language models employ unique, monolithic embeddings for each token, limiting their ability to capture multifaceted meanings. |
| Approach: | They propose a compositional structure that accumulates diverse semantic facets for tokens . they apply this representational scheme to standard transformer architectures and a biomedical domain benchmark . |
| Outcome: | The proposed representational scheme achieves extreme compression in embedding parameters while maintaining >95% task performance relative to the base model. |
Enhancing Complex Reasoning in Knowledge Graph Question Answering through Query Graph Approximation (2025.findings-acl)
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| Challenge: | Existing knowledge-grounded question answering frameworks lack essential triplets related to the questions . Existing approaches to knowledge-based QA are incomplete in the context of KGs . |
| Approach: | They propose a framework to provide answers to structured queries by leveraging Knowledge Graphs. |
| Outcome: | The proposed framework outperforms existing methods on QA tasks where KGs are incomplete . the framework is based on a set of data from a dataset of QA questions . |
BYOKG-RAG: Multi-Strategy Graph Retrieval for Knowledge Graph Question Answering (2025.emnlp-main)
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Costas Mavromatis, Soji Adeshina, Vassilis N. Ioannidis, Zhen Han, Qi Zhu, Ian Robinson, Bryan Thompson, Huzefa Rangwala, George Karypis
| Challenge: | Existing approaches to knowledge graph question answering (KGQA) rely on Large Language Model (LLM) agents for graph traversal and retrieval. |
| Approach: | They propose a framework that synergizes Large Language Models with specialized graph retrieval tools to enhance KGQA. |
| Outcome: | The proposed framework outperforms the second-best graph retrieval method by 4.5% points while showing better generalization to custom KGs. |
CAMEC: Complexity-Aware Multi-Expert Collaboration for Reliable Chinese Medical Question Answering (2026.acl-long)
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| Challenge: | Large language models are promising for medical question answering in china, but remain unreliable due to hallucinations, weak factual grounding and difficulty handling clinically complex cases. |
| Approach: | They propose a framework that combines hierarchical medical adaptation with complexity-aware expert routing for reliable Chinese medical QA. |
| Outcome: | The proposed framework outperforms strong general and medical LLM baselines on four Chinese medical benchmarks. |
Beyond Static Synthetic Noise: Assessing the Robustness of Large Language Models to Natural Context Variation in the Real World (2026.findings-acl)
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| Challenge: | Current robustness evaluation methods rely on static synthetic perturbations to stress-test models. |
| Approach: | They propose a framework for automatically evaluating QA models under naturally occurring textual perturbations by replacing context passages with revised Wikipedia edit histories. |
| Outcome: | The proposed framework replaces context passages with revised Wikipedia edit histories to improve model performance. |
Reasoning with Memory: Adaptive Information Management for Retrieval-Augmented Generation (2026.findings-acl)
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| Challenge: | Multi-hop reasoning remains a fundamental challenge for Retrieval-Augmented Generation systems. |
| Approach: | They propose a framework that provides a dynamic cognitive workspace for multi-hop reasoning . it uses an explicit working memory that persists across retrieval cycles and is continuously updated . |
| Outcome: | The proposed framework achieves state-of-the-art performance over existing systems on eight QA benchmarks. |
Perception, Understanding and Reasoning: A Multimodal Benchmark for Video Fake News Detection (2026.acl-long)
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| Challenge: | Existing video fake news detection benchmarks focus on the detection accuracy, while failing to provide fine-grained assessments for the entire detection process. |
| Approach: | They propose a process-oriented video fake news detection benchmark that evaluates MLLMs' perception, understanding, and reasoning capabilities in VFND. |
| Outcome: | The proposed model achieves sota performance on video fake news detection tasks. |