BLCU_NLP at SemEval-2019 Task 7: An Inference Chain-based GPT Model for Rumour Evaluation

Ruoyao Yang, Wanying Xie, Chunhua Liu, Dong Yu


Abstract
Researchers have been paying increasing attention to rumour evaluation due to the rapid spread of unsubstantiated rumours on social media platforms, including SemEval 2019 task 7. However, labelled data for learning rumour veracity is scarce, and labels in rumour stance data are highly disproportionate, making it challenging for a model to perform supervised-learning adequately. We propose an inference chain-based system, which fully utilizes conversation structure-based knowledge in the limited data and expand the training data in minority categories to alleviate class imbalance. Our approach obtains 12.6% improvement upon the baseline system for subtask A, ranks 1st among 21 systems in subtask A, and ranks 4th among 12 systems in subtask B.
Anthology ID:
S19-2191
Volume:
Proceedings of the 13th International Workshop on Semantic Evaluation
Month:
June
Year:
2019
Address:
Minneapolis, Minnesota, USA
Venue:
SemEval
SIG:
SIGLEX
Publisher:
Association for Computational Linguistics
Note:
Pages:
1090–1096
Language:
URL:
https://aclanthology.org/S19-2191
DOI:
10.18653/v1/S19-2191
Bibkey:
Cite (ACL):
Ruoyao Yang, Wanying Xie, Chunhua Liu, and Dong Yu. 2019. BLCU_NLP at SemEval-2019 Task 7: An Inference Chain-based GPT Model for Rumour Evaluation. In Proceedings of the 13th International Workshop on Semantic Evaluation, pages 1090–1096, Minneapolis, Minnesota, USA. Association for Computational Linguistics.
Cite (Informal):
BLCU_NLP at SemEval-2019 Task 7: An Inference Chain-based GPT Model for Rumour Evaluation (Yang et al., SemEval 2019)
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PDF:
https://aclanthology.org/S19-2191.pdf