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This paper presents a novel framework for reconstructing multi-hop explanations in science Question Answering (QA). While existing approaches for multi-hop reasoning build explanations considering each question in isolation, we propose a…

Artificial Intelligence · Computer Science 2021-02-11 Marco Valentino , Mokanarangan Thayaparan , André Freitas

Researchers produce thousands of scholarly documents containing valuable technical knowledge. The community faces the laborious task of reading these documents to identify, extract, and synthesize information. To automate information…

Computation and Language · Computer Science 2023-12-13 Tavish McDonald , Brian Tsan , Amar Saini , Juanita Ordonez , Luis Gutierrez , Phan Nguyen , Blake Mason , Brenda Ng

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

RAG (Retrieval-Augmented Generation) systems and web agents are increasingly evaluated on multi-hop deep search tasks, yet current practice suffers from two major limitations. First, most benchmarks leak the reasoning path in the question…

Computation and Language · Computer Science 2025-12-11 Maojia Song , Renhang Liu , Xinyu Wang , Yong Jiang , Pengjun Xie , Fei Huang , Jingren Zhou , Dorien Herremans , Soujanya Poria

Retrieval-augmented generation (RAG) systems have made significant progress in solving complex multi-hop question answering (QA) tasks in the English scenario. However, RAG systems inevitably face the application scenario of retrieving…

Computation and Language · Computer Science 2026-03-20 Yilin Wang , Yuchun Fan , Jiaoyang Li , Ziming Zhu , Yongyu Mu , Qiaozhi He , Tong Xiao , Jingbo Zhu

Reading Comprehension (RC) is a task of answering a question from a given passage or a set of passages. In the case of multiple passages, the task is to find the best possible answer to the question. Recent trials and experiments in the…

Computation and Language · Computer Science 2022-01-06 Avi Chawla

When answering complex questions, people can seamlessly combine information from visual, textual and tabular sources. While interest in models that reason over multiple pieces of evidence has surged in recent years, there has been…

Computation and Language · Computer Science 2021-04-14 Alon Talmor , Ori Yoran , Amnon Catav , Dan Lahav , Yizhong Wang , Akari Asai , Gabriel Ilharco , Hannaneh Hajishirzi , Jonathan Berant

Large Language Models (LLMs) have been increasingly employed for query expansion. However, their generative nature often undermines performance on complex multi-hop retrieval tasks by introducing irrelevant or noisy information. To address…

Information Retrieval · Computer Science 2026-03-24 JungMin Yun , YoungBin Kim

Fact-checking real-world claims often requires complex, multi-step reasoning due to the absence of direct evidence to support or refute them. However, existing fact-checking systems often lack transparency in their decision-making, making…

Computation and Language · Computer Science 2023-10-12 Liangming Pan , Xinyuan Lu , Min-Yen Kan , Preslav Nakov

Explainable multi-hop question answering (QA) not only predicts answers but also identifies rationales, i. e. subsets of input sentences used to derive the answers. This problem has been extensively studied under the supervised setting,…

Computation and Language · Computer Science 2023-05-24 Wenting Zhao , Justin T. Chiu , Claire Cardie , Alexander M. Rush

Retrieval-augmented generation (RAG) has emerged as a promising paradigm for enhancing large language models (LLMs) on multi-hop question answering (QA), which requires reasoning over evidence from multiple documents. Current multi-hop RAG…

Computation and Language · Computer Science 2026-05-28 Yikai Zhu , Kunfeng Chen , Qihuang Zhong , Juhua Liu , Bo Du

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

Biomedical Question Answering systems play a critical role in processing complex medical queries, yet they often struggle with the intricate nature of medical data and the demand for multi-hop reasoning. In this paper, we propose a model…

Computation and Language · Computer Science 2026-01-13 Quoc-An Nguyen , Thi-Minh-Thu Vu , Bich-Dat Nguyen , Dinh-Quang-Minh Tran , Hoang-Quynh Le

Accurately answering complex questions has consistently been a significant challenge for Large Language Models (LLMs). To address this, this paper proposes a multi-hop question decomposition method for complex questions, building upon…

Computation and Language · Computer Science 2025-09-08 Zucheng Liang , Wenxin Wei , Kaijie Zhang , Hongyi Chen

Multi-hop Question Answering (QA) is a challenging task because it requires precise reasoning with entity relations at every step towards the answer. The relations can be represented in terms of labels in knowledge graph (e.g.,…

Computation and Language · Computer Science 2021-10-12 Jiaxin Shi , Shulin Cao , Lei Hou , Juanzi Li , Hanwang Zhang

Multi-hop QA requires reasoning over multiple supporting facts to answer the question. However, the existing QA models always rely on shortcuts, e.g., providing the true answer by only one fact, rather than multi-hop reasoning, which is…

Artificial Intelligence · Computer Science 2022-10-14 Wangzhen Guo , Qinkang Gong , Hanjiang Lai

We propose a new model, DocHopper, that iteratively attends to different parts of long, hierarchically structured documents to answer complex questions. Similar to multi-hop question-answering (QA) systems, at each step, DocHopper uses a…

Computation and Language · Computer Science 2021-10-25 Haitian Sun , William W. Cohen , Ruslan Salakhutdinov

In this paper, we introduce SWE-QA, a text and code corpus aimed at benchmarking multi-hop code comprehension, addressing the gap between simplified evaluation tasks and the complex reasoning required in real-world software development.…

Software Engineering · Computer Science 2026-04-29 Laïla Elkoussy , Julien Perez

Answering multi-hop questions over hybrid factual knowledge from the given text and table (TextTableQA) is a challenging task. Existing models mainly adopt a retriever-reader framework, which have several deficiencies, such as noisy…

Computation and Language · Computer Science 2024-06-26 Fangyu Lei , Xiang Li , Yifan Wei , Shizhu He , Yiming Huang , Jun Zhao , Kang Liu

Multi-hop question answering is a challenging task with distinct industrial relevance, and Retrieval-Augmented Generation (RAG) methods based on large language models (LLMs) have become a popular approach to tackle this task. Owing to the…

Computation and Language · Computer Science 2025-01-31 Zhouyu Jiang , Mengshu Sun , Lei Liang , Zhiqiang Zhang