CONCRETE: Improving Cross-lingual Fact-checking with Cross-lingual Retrieval

Kung-Hsiang Huang, ChengXiang Zhai, Heng Ji


Abstract
Fact-checking has gained increasing attention due to the widespread of falsified information. Most fact-checking approaches focus on claims made in English only due to the data scarcity issue in other languages. The lack of fact-checking datasets in low-resource languages calls for an effective cross-lingual transfer technique for fact-checking. Additionally, trustworthy information in different languages can be complementary and helpful in verifying facts. To this end, we present the first fact-checking framework augmented with cross-lingual retrieval that aggregates evidence retrieved from multiple languages through a cross-lingual retriever. Given the absence of cross-lingual information retrieval datasets with claim-like queries, we train the retriever with our proposed Cross-lingual Inverse Cloze Task (X-ICT), a self-supervised algorithm that creates training instances by translating the title of a passage. The goal for X-ICT is to learn cross-lingual retrieval in which the model learns to identify the passage corresponding to a given translated title. On the X-Fact dataset, our approach achieves 2.23% absolute F1 improvement in the zero-shot cross-lingual setup over prior systems. The source code and data are publicly available at https://github.com/khuangaf/CONCRETE.
Anthology ID:
2022.coling-1.86
Volume:
Proceedings of the 29th International Conference on Computational Linguistics
Month:
October
Year:
2022
Address:
Gyeongju, Republic of Korea
Venue:
COLING
SIG:
Publisher:
International Committee on Computational Linguistics
Note:
Pages:
1024–1035
Language:
URL:
https://aclanthology.org/2022.coling-1.86
DOI:
Bibkey:
Cite (ACL):
Kung-Hsiang Huang, ChengXiang Zhai, and Heng Ji. 2022. CONCRETE: Improving Cross-lingual Fact-checking with Cross-lingual Retrieval. In Proceedings of the 29th International Conference on Computational Linguistics, pages 1024–1035, Gyeongju, Republic of Korea. International Committee on Computational Linguistics.
Cite (Informal):
CONCRETE: Improving Cross-lingual Fact-checking with Cross-lingual Retrieval (Huang et al., COLING 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.coling-1.86.pdf
Code
 khuangaf/concrete
Data
X-Fact