Challenge: Large Language Models have shown promising results in coreference resolution, but they face a critical issue: hallucinations.
Approach: They propose a low-hallucination and efficient solution to the problem of hallucinations . they propose efficient constrained decoding for coreference resolution .
Outcome: The proposed approach achieves better performance on the English OntoNotes development set.

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HALoGEN: Fantastic LLM Hallucinations and Where to Find Them (2025.acl-long)

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Challenge: generative large language models produce hallucinations that are not aligned with world knowledge or input context.
Approach: They propose a hallucination benchmark framework that measures hallucinism in large language models . they evaluate 150,000 generations from 14 language models and find they are riddled with hallucinos .
Outcome: The proposed framework evaluates 150,000 generations from 14 language models.
ANAH: Analytical Annotation of Hallucinations in Large Language Models (2024.acl-long)

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Challenge: a comprehensive and fine-grained measurement of the hallucination is crucial for LLMs' wide applications.
Approach: They propose a dataset that offers ANalytical Annotation of Hallucinations in Large Language Models.
Outcome: The proposed dataset can be used to train and evaluate hallucination annotators.
Tutorial Proposal: Hallucination in Large Language Models (2024.lrec-tutorials)

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Challenge: Grasping the intricacies of hallucination in LLMs can be daunting, especially for those new to the field.
Approach: This tutorial aims to bridge the gap between the field and the field of hallucination . it will explore the key aspects of hallucinonation, including benchmarking, detection, and mitigation techniques .
Outcome: This tutorial will explore the key aspects of hallucination in LLMs . it will also explore the specific constraints and shortcomings of current approaches .
Alleviating Hallucinations of Large Language Models through Induced Hallucinations (2025.findings-naacl)

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Challenge: Existing studies have shown that large language models generate inaccurate or fabricated information, a phenomenon known as hallucinations.
Approach: They propose a simple strategy to induce-then-contrast decode LLMs to enhance their factuality . they first induce hallucinations from the original model and penalize them .
Outcome: The proposed strategy improves factuality of large language models across task formats, model sizes, and model families.
Fine-Grained Detection of Context-Grounded Hallucinations Using LLMs (2026.findings-acl)

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Challenge: Existing representations of hallucinations limit the types of errors that can be expressed, so we propose a new representation based on free-form textual descriptions, capturing the full range of possible errors.
Approach: They propose a benchmark for localizing hallucinations using LLMs with a human annotation of over 1,000 examples and a protocol to verify its quality in a humans evaluation.
Outcome: The proposed representation captures the full range of possible errors, and the best model achieves an F1 score of 0.67.
Hallucination Diversity-Aware Active Learning for Text Summarization (2024.naacl-long)

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Challenge: Existing methods for alleviating hallucinations require costly human annotations . Existing approaches focus on a specific type of hallucinism, which limits their effectiveness .
Approach: They propose a method to detect hallucinations from errors in semantic frame, discourse and content verifiability in LLM summarization using HAllucination Diversity-Aware Sampling.
Outcome: The proposed framework reduces the need for costly human annotations to correct hallucinations in LLM outputs.
From Single to Multi: How LLMs Hallucinate in Multi-Document Summarization (2025.findings-naacl)

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Challenge: a recent study investigated hallucinations in multi-document summarization tasks . but, it is unclear how challenges arising from handling multiple documents affect outputs .
Approach: They investigate how hallucinations manifest in large language models when summarizing topic-specific information from a set of documents.
Outcome: The proposed benchmarks show that the models generate more hallucinations than baselines . the results highlight the need for more effective approaches to mitigate hallucinosity in MDS .
The Troubling Emergence of Hallucination in Large Language Models - An Extensive Definition, Quantification, and Prescriptive Remediations (2023.emnlp-main)

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Challenge: Recent advances in Large Language Models have generated widespread acclaim, but hallucination has also emerged as a by-product.
Approach: They propose a fine-grained discourse on profiling hallucination based on its degree, orientation, and category . they categorize hallucines into six types: acronym ambiguity, generated golem, virtual voice, geographic erratum, time wrap .
Outcome: The proposed method categorizes hallucination into six types based on their degree, orientation, and category .
Unlocking Anticipatory Text Generation: A Constrained Approach for Large Language Models Decoding (2024.emnlp-main)

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Challenge: Large language models have shown a powerful ability for text generation, but undesired behaviors such as toxicity and hallucinations can manifest.
Approach: They propose to formalize text generation as a future-constrained generation problem to minimize undesirable behaviors and enforce faithfulness to instructions.
Outcome: The proposed approach is effective across three tasks, including keyword-constrained generation, toxicity reduction, and factual correctness in question-answering.
SAFE: A Sparse Autoencoder-Based Framework for Robust Query Enrichment and Hallucination Mitigation in LLMs (2025.findings-emnlp)

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Challenge: Large Language Models suffer from hallucinations, which can undermine their performance in critical applications.
Approach: They propose a framework for detecting and mitigating hallucinations by leveraging SAEs.
Outcome: The proposed framework improves query generation accuracy and mitigates hallucinations across datasets.

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