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Large Language Models (LLMs) have demonstrated remarkable capabilities in complex reasoning tasks, particularly when augmented with search mechanisms that enable systematic exploration of external knowledge bases. The field has evolved from…

Computation and Language · Computer Science 2026-01-27 Yanming Liu , Xinyue Peng , Zixuan Yan , Yanxin Shen , Wenjie Xu , Yuefeng Huang , Xinyi Wang , Jiannan Cao , Jianwei Yin , Xuhong Zhang

While large language models (LLMs) have demonstrated strong capabilities in tasks like question answering and fact verification, they continue to suffer from hallucinations and reasoning errors, especially in multi-hop tasks that require…

Computation and Language · Computer Science 2025-04-15 Jingtian Wu , Claire Cardie

Retrieval-Augmented Generation (RAG) has emerged as a powerful paradigm for Large Language Models (LLMs) to address knowledge-intensive queries requiring domain-specific or up-to-date information. To handle complex multi-hop questions that…

Computation and Language · Computer Science 2026-01-05 Yuxin Wang , Shicheng Fang , Bo Wang , Qi Luo , Xuanjing Huang , Yining Zheng , Xipeng Qiu

Multi-hop question answering (QA) requires reasoning over multiple documents to answer a complex question and provide interpretable supporting evidence. However, providing supporting evidence is not enough to demonstrate that a model has…

Computation and Language · Computer Science 2022-09-16 Zhenyun Deng , Yonghua Zhu , Yang Chen , Qianqian Qi , Michael Witbrock , Patricia Riddle

Multi-hop question answering is a challenging task in which language models must reason over multiple steps to reach the correct answer. With the help of Large Language Models and their reasoning capabilities, existing systems are able to…

Machine Learning · Computer Science 2025-12-08 Durga Prasad Maram , Kalpa Gunaratna , Vijay Srinivasan , Haris Jeelani , Srinivas Chappidi

Multi-Hop Question Answering (MHQA) tasks permeate real-world applications, posing challenges in orchestrating multi-step reasoning across diverse knowledge domains. While existing approaches have been improved with iterative retrieval,…

Machine Learning · Computer Science 2025-10-06 Rong Cheng , Jinyi Liu , Yan Zheng , Fei Ni , Jiazhen Du , Hangyu Mao , Fuzheng Zhang , Bo Wang , Jianye Hao

Efficient multi-hop reasoning requires Large Language Models (LLMs) based agents to acquire high-value external knowledge iteratively. Previous work has explored reinforcement learning (RL) to train LLMs to perform search-based document…

Computation and Language · Computer Science 2025-05-27 Ziliang Wang , Xuhui Zheng , Kang An , Cijun Ouyang , Jialu Cai , Yuhang Wang , Yichao Wu

The proliferation of misinformation necessitates robust yet computationally efficient fact verification systems. While current state-of-the-art approaches leverage Large Language Models (LLMs) for generating explanatory rationales, these…

Computation and Language · Computer Science 2025-11-10 Alamgir Munir Qazi , John P. McCrae , Jamal Abdul Nasir

Applying existing question answering (QA) systems to specialized domains like law and finance presents challenges that necessitate domain expertise. Although large language models (LLMs) have shown impressive language comprehension and…

Computation and Language · Computer Science 2023-10-24 Vaibhav Mavi , Abulhair Saparov , Chen Zhao

With the rise of large-scale language models (LLMs), it is currently popular and effective to convert multimodal information into text descriptions for multimodal multi-hop question answering. However, we argue that the current methods of…

Computation and Language · Computer Science 2024-12-11 Qing Zhang , Haocheng Lv , Jie Liu , Zhiyun Chen , Jianyong Duan , Hao Wang , Li He , Mingying Xv

Large Language Models (LLMs) excel in many areas but continue to face challenges with complex reasoning tasks, such as Multi-Hop Question Answering (MHQA). MHQA requires integrating evidence from diverse sources while managing intricate…

Computation and Language · Computer Science 2025-05-29 Bolei He , Xinran He , Mengke Chen , Xianwei Xue , Ying Zhu , Zhenhua Ling

Dense retrievers enhance retrieval by encoding queries and documents into continuous vectors, but they often struggle with reasoning-intensive queries. Although Large Language Models (LLMs) can reformulate queries to capture complex…

Information Retrieval · Computer Science 2025-10-29 Yichi Zhang , Jun Bai , Zhixin Cai , Shuhan Qin , Zhuofan Chen , Jinghua Guan , Wenge Rong

Recent progress in deep learning has continuously improved the accuracy of dialogue response selection. In particular, sophisticated neural network architectures are leveraged to capture the rich interactions between dialogue context and…

Computation and Language · Computer Science 2022-04-26 Tian Lan , Deng Cai , Yan Wang , Yixuan Su , Heyan Huang , Xian-Ling Mao

Large Language Models (LLMs) frequently produce factually inaccurate outputs - a phenomenon known as hallucination - which limits their accuracy in knowledge-intensive NLP tasks. Retrieval-augmented generation and agentic frameworks such as…

Computation and Language · Computer Science 2025-04-01 Alexander Murphy , Mohd Sanad Zaki Rizvi , Aden Haussmann , Ping Nie , Guifu Liu , Aryo Pradipta Gema , Pasquale Minervini

Retrieval-augmented generation (RAG) has become integral to large language models (LLMs), particularly for conversational AI systems where user questions may reference knowledge beyond the LLMs' training cutoff. However, many natural user…

Computation and Language · Computer Science 2025-05-06 Zhiyuan Peng , Jinming Nian , Alexandre Evfimievski , Yi Fang

Enabling large language models (LLMs) to utilize search tools offers a promising path to overcoming fundamental limitations such as knowledge cutoffs and hallucinations. Recent work has explored reinforcement learning (RL) for training…

Artificial Intelligence · Computer Science 2025-10-07 Yiding Wang , Zhepei Wei , Xinyu Zhu , Yu Meng

Large language model (LLM) agents still struggle with long-term memory question answering, where answer-supporting evidence is often scattered across long conversational histories and buried in substantial irrelevant content. Existing…

Computation and Language · Computer Science 2026-05-22 Jianing Yin , Tan Tang

Recent progress in retrieval-augmented generation (RAG) has led to more accurate and interpretable multi-hop question answering (QA). Yet, challenges persist in integrating iterative reasoning steps with external knowledge retrieval. To…

Computation and Language · Computer Science 2025-10-06 Tengjun Ni , Xin Yuan , Shenghong Li , Kai Wu , Ren Ping Liu , Wei Ni , Wenjie Zhang

Lexical and semantic matches are commonly used as relevance measurements for information retrieval. Together they estimate the semantic equivalence between the query and the candidates. However, semantic equivalence is not the only…

Computation and Language · Computer Science 2023-11-07 Fan Luo , Mihai Surdeanu

Large Language Models (LLMs) have demonstrated significant potential in medical Question Answering (QA), yet they remain prone to hallucinations and ungrounded reasoning, limiting their reliability in high-stakes clinical scenarios. While…

Information Retrieval · Computer Science 2026-01-09 Jessica Ryan , Alexander I. Gumilang , Robert Wiliam , Derwin Suhartono