Cited by 159Misinformation and Its ImpactsTopic ModelingMultimodal Machine Learning Applications

Reasoning Over Semantic-Level Graph for Fact Checking

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Zhong, Wanjun, Xu, Jingjing, Tang, Duyu, Xu, Zenan, Duan, Nan, Zhou, Ming, Wang, Jiahai, Yin, Jian·2020·Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics

Abstract

Fact checking is a challenging task because verifying the truthfulness of a claim requires reasoning about multiple retrievable evidence.In this work, we present a method suitable for reasoning about the semantic-level structure of evidence.Unlike most previous works, which typically represent evidence sentences with either string concatenation or fusing the features of isolated evidence sentences, our approach operates on rich semantic structures of evidence obtained by semantic role labeling.We propose two mechanisms to exploit the structure of evidence while leveraging the advances of pre-trained models like BERT, GPT or XLNet.Specifically, using XLNet as the backbone, we first utilize the graph structure to re-define the relative distances of words, with the intuition that semantically related words should have short distances.Then, we adopt graph convolutional network and graph attention network to propagate and aggregate information from neighboring nodes on the graph.We evaluate our system on FEVER, a benchmark dataset for fact checking, and find that rich structural information is helpful and both our graph-based mechanisms improve the accuracy.Our model is the state-of-the-art system in terms of both official evaluation metrics, namely claim verification accuracy and FEVER score.

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  • Existing fact-verification approaches follow a multi-stage pipeline of claim detection, evidence retrieval and verdict prediction, require external databases, and can have considerable inference costs.

    “Existing fact-verification approaches follow a multi-stage pipeline of claim detection, evidence retrieval and verdict prediction (Guo et al., 2022; Zhong et al., 2020). Such methods, however, require access to external databases and can have considerable inference costs.”

    From SelfCheckGPT: Zero-Resource Black-Box Hallucination Detection for Generative Large Language Models (2023) · cites this paper as Zhong et al., 2020

    Section 2 (page unavailable) describes a multi-stage pipeline that retrieves documents, selects evidence sentences, and predicts a verdict; Section 4.1 specifies Wikipedia documents as its evidence source. The pipeline takes a claim as input, so it does not establish claim detection as a stage. The passages do not assess inference costs. (LLM, conf=0.87)

    Experimental — accuracy not yet measured

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Authors
Zhong, W., Xu, J., Tang, D., Xu, Z., Duan, N., Zhou, M., Wang, J., & Yin, J.
Affiliations
  • Sun Yat-sen University (CN)
  • Peking University (CN)
  • Microsoft (United States) (US)
Venue
Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics
Published
2020
Pages
6170-6180
ISSN
0736-587X (ISSN-L)
OpenAlex
W3034808961
Cited by
151
References
36
Citations by year
2026: 4 · 2025: 15 · 2024: 22 · 2023: 26 · 2022: 36 · 2021: 38 · 2020: 10
FWCI
58.32
Type
conference paper
Language
en
Open access
Licence
cc-by
Locations
Proceedings of the conference - Association for Computational Linguistics. Meeting (publishedVersion, cc-by)
Funders
  • National Natural Science Foundation of China (U1611264, U1711262, U1811261, U1811264, U1711261, U1911203)
  • Basic and Applied Basic Research Foundation of Guangdong Province (2019B15 15130001)
Topics
  • Social Sciences › Sociology and Political Science › Misinformation and Its Impacts
  • Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Multimodal Machine Learning Applications
Keywords
fact-checking, claim verification, semantic role labeling, graph convolutional networks, graph attention networks, XLNet, FEVER dataset, word distance

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