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Long-form question answering (LFQA) aims to generate a paragraph-length answer for a given question. While current work on LFQA using large pre-trained model for generation are effective at producing fluent and somewhat relevant content,…

Computation and Language · Computer Science 2022-03-02 Dan Su , Xiaoguang Li , Jindi Zhang , Lifeng Shang , Xin Jiang , Qun Liu , Pascale Fung

Extending the context window of large language models (LLMs) is getting popular recently, while the solution of augmenting LLMs with retrieval has existed for years. The natural questions are: i) Retrieval-augmentation versus long context…

Computation and Language · Computer Science 2024-01-24 Peng Xu , Wei Ping , Xianchao Wu , Lawrence McAfee , Chen Zhu , Zihan Liu , Sandeep Subramanian , Evelina Bakhturina , Mohammad Shoeybi , Bryan Catanzaro

Current large language models (LLMs) can exhibit near-human levels of performance on many natural language-based tasks, including open-domain question answering. Unfortunately, at this time, they also convincingly hallucinate incorrect…

Information Retrieval · Computer Science 2023-09-29 Siqing Huo , Negar Arabzadeh , Charles L. A. Clarke

Reinforcement Learning with Verifiable Rewards~(RLVR) has become a prominent paradigm to enhance the capabilities (i.e.\ long-context) of Large Language Models~(LLMs). However, it often relies on gold-standard answers or explicit evaluation…

Computation and Language · Computer Science 2026-03-03 Yao Xiao , Lei Wang , Yue Deng , Guanzheng Chen , Ziqi Jin , Jung-jae Kim , Xiaoli Li , Roy Ka-wei Lee , Lidong Bing

Large Language Models (LLMs) have shown impressive results on a variety of text understanding tasks. Search queries though pose a unique challenge, given their short-length and lack of nuance or context. Complicated feature engineering…

Computation and Language · Computer Science 2022-10-31 Krishna Srinivasan , Karthik Raman , Anupam Samanta , Lingrui Liao , Luca Bertelli , Mike Bendersky

Retrieval-augmented generation (RAG) is a promising approach to address the limitations of fixed knowledge in large language models (LLMs). However, current benchmarks for evaluating RAG systems suffer from two key deficiencies: (1) they…

Computation and Language · Computer Science 2025-01-28 Zehan Qi , Rongwu Xu , Zhijiang Guo , Cunxiang Wang , Hao Zhang , Wei Xu

Retrieval-Augmented Generation (RAG) enhances the factuality of Large Language Models (LLMs) by incorporating retrieved documents and/or generated context. However, LLMs often exhibit a stylistic bias when presented with mixed contexts,…

Computation and Language · Computer Science 2026-04-21 Jiaang Li , Zhendong Mao , Quan Wang , Yuning Wan , Yongdong Zhang

Medical question-answering (QA) systems can benefit from advances in large language models (LLMs), but directly applying LLMs to the clinical domain poses challenges such as maintaining factual accuracy and avoiding hallucinations. In this…

Computation and Language · Computer Science 2025-12-08 Tasnimul Hassan , Md Faisal Karim , Haziq Jeelani , Elham Behnam , Robert Green , Fayeq Jeelani Syed

Question answering (QA) has become an important application in the advanced development of large language models. General pre-trained large language models for question-answering are not trained to properly understand the knowledge or…

Computation and Language · Computer Science 2024-05-30 Sanat Sharma , David Seunghyun Yoon , Franck Dernoncourt , Dewang Sultania , Karishma Bagga , Mengjiao Zhang , Trung Bui , Varun Kotte

Large Language Models (LLMs) make natural interfaces to factual knowledge, but their usefulness is limited by their tendency to deliver inconsistent answers to semantically equivalent questions. For example, a model might predict both "Anne…

Computation and Language · Computer Science 2023-11-03 Lovisa Hagström , Denitsa Saynova , Tobias Norlund , Moa Johansson , Richard Johansson

Large language models (LLMs) have achieved remarkable advancements in natural language understanding and generation. However, one major issue towards their widespread deployment in the real world is that they can generate "hallucinated"…

Computation and Language · Computer Science 2024-04-04 Xi Ye , Ruoxi Sun , Sercan Ö. Arik , Tomas Pfister

\Ac{LFQA} aims to generate lengthy answers to complex questions. This scenario presents great flexibility as well as significant challenges for evaluation. Most evaluations rely on deterministic metrics that depend on string or n-gram…

Information Retrieval · Computer Science 2025-04-28 Ning Xian , Yixing Fan , Ruqing Zhang , Maarten de Rijke , Jiafeng Guo

Large Language Models (LLMs) augmented with retrieval mechanisms have demonstrated significant potential in fact-checking tasks by integrating external knowledge. However, their reliability decreases when confronted with conflicting…

Computation and Language · Computer Science 2025-05-26 Ziyu Ge , Yuhao Wu , Daniel Wai Kit Chin , Roy Ka-Wei Lee , Rui Cao

Large language models (LLMs) are incredible and versatile tools for text-based tasks that have enabled countless, previously unimaginable, applications. Retrieval models, in contrast, have not yet seen such capable general-purpose models…

Information Retrieval · Computer Science 2025-09-10 Julian Killingback , Hamed Zamani

Large Language Models (LLMs) have demonstrated significant capabilities, particularly in the domain of question answering (QA). However, their effectiveness in QA is often undermined by the vagueness of user questions. To address this…

Computation and Language · Computer Science 2025-02-26 Junhao Chen , Bowen Wang , Zhouqiang Jiang , Yuta Nakashima

This study delves into the capabilities and limitations of Large Language Models (LLMs) in the challenging domain of conditional question-answering. Utilizing the Conditional Question Answering (CQA) dataset and focusing on generative…

Computation and Language · Computer Science 2023-12-05 Syed-Amad Hussain , Parag Pravin Dakle , SaiKrishna Rallabandi , Preethi Raghavan

Proprietary corporate documents contain rich domain-specific knowledge, but their overwhelming volume and disorganized structure make it difficult even for employees to access the right information when needed. For example, in the…

Artificial Intelligence · Computer Science 2025-08-28 Nayoung Choi , Grace Byun , Andrew Chung , Ellie S. Paek , Shinsun Lee , Jinho D. Choi

Current large language models (LLMs) can exhibit near-human levels of performance on many natural language tasks, including open-domain question answering. Unfortunately, they also convincingly hallucinate incorrect answers, so that…

Information Retrieval · Computer Science 2023-06-27 Siqing Huo , Negar Arabzadeh , Charles L. A. Clarke

The integration of retrieval-augmented techniques with LLMs has shown promise in improving performance across various domains. However, their utility in tasks requiring advanced reasoning, such as generating and evaluating mathematical…

Artificial Intelligence · Computer Science 2024-12-24 Majd Zayyad , Yossi Adi

We address the task of evidence retrieval for long document question answering, which involves locating relevant paragraphs within a document to answer a question. We aim to assess the applicability of large language models (LLMs) in the…

Computation and Language · Computer Science 2023-11-23 Inderjeet Nair , Shwetha Somasundaram , Apoorv Saxena , Koustava Goswami