Papers by Christan Grant
Ask-and-Verify: Span Candidate Generation and Verification for Attribute Value Extraction (2022.emnlp-industry)
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| Challenge: | Existing reading comprehension models can over-generate attribute values which hinders precision. |
| Approach: | They propose a product attribute value extraction task that captures key factual information from product descriptions and a new end-to-end pipeline framework called Ask-and-Verify. |
| Outcome: | The proposed framework outperforms existing models by up to 3.1% F1 absolute improvement points while scaling to thousands of attributes. |
Let The Jury Decide: Fair Demonstration Selection for In-Context Learning through Incremental Greedy Evaluation (2025.findings-acl)
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| Challenge: | Existing demonstration selection strategies focus on optimizing performance metrics such as accuracy. |
| Approach: | They propose a framework for selecting fair and representative demonstrations that improve group fairness in In-Context Learning. |
| Outcome: | The proposed framework improves fairness metrics without compromising accuracy. |
RAMQA: A Unified Framework for Retrieval-Augmented Multi-Modal Question Answering (2025.findings-naacl)
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| Challenge: | Existing ranking methods rely on small encoder-based ranking models, which are incompatible with modern decoder--based generative large language models (LLMs) Existing methods based on small LLaVA rankers are incompatible with advanced LLMs. |
| Approach: | They propose a framework that combines learning-to-rank methods with generative permutation-enhanced ranking techniques. |
| Outcome: | The proposed framework improves on two benchmarks, WebQA and MultiModalQA, showing significant improvements over baselines. |
M3: A Multi-Task Mixed-Objective Learning Framework for Open-Domain Multi-Hop Dense Sentence Retrieval (2024.lrec-main)
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| Challenge: | Recent research shows that contrastive learning can lead to suboptimal retrieval performance. |
| Approach: | They propose an advanced recursive Multi-hop dense sentence retrieval system built upon a novel Multi-task Mixed-objective approach for dense text representation learning. |
| Outcome: | The proposed approach yields state-of-the-art performance on a large-scale open-domain fact verification benchmark dataset, FEVER. |
Afrispeech Semantics: Evaluating Audio–Semantic Reasoning in Spoken Language Models Across Domains and Accents (2026.findings-acl)
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| Challenge: | Recent multimodal models are trained on large collections of audio-text pairs using contrastive learning or nexttoken prediction objectives. |
| Approach: | They evaluate audio language models across five semantic and paralinguistic reasoning tasks: entailment, consistency, plausibility, accent drift, and accent restraint. |
| Outcome: | The evaluations assess models across five tasks including entailment, consistency, plausibility, accent drift, and accent restraint. |
AdaTag: Multi-Attribute Value Extraction from Product Profiles with Adaptive Decoding (2021.acl-long)
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| Challenge: | Existing approaches to extract product attribute values are limited by knowledge sharing across different attributes. |
| Approach: | They propose to use adaptive decoding to handle extraction of product attribute values by parameterizing the decoder with pretrained attribute embeddings, through a hypernetwork and a Mixture-of-Experts module. |
| Outcome: | The proposed model is able to handle multiple attributes without sharing the entire network parameters across all attributes. |
What data should I include in my POS tagging training set? (2025.findings-emnlp)
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| Challenge: | POS tagging is a crucial task for descriptive linguistics and language documentation . POS tags are not available in all languages, but are used for training sets for understudied languages . |
| Approach: | They compare POS tagging with in-context learning, active learning, and random sampling . they find that POS can deliver reasonable results for communities with limited resources . |
| Outcome: | The proposed training set for Indigenous and endangered languages performs better than random sampling. |