1Cademy @ Causal News Corpus 2022: Enhance Causal Span Detection via Beam-Search-based Position Selector

Xingran Chen, Ge Zhang, Adam Nik, Mingyu Li, Jie Fu


Abstract
In this paper, we present our approach and empirical observations for Cause-Effect Signal Span Detection—Subtask 2 of Shared task 3 at CASE 2022. The shared task aims to extract the cause, effect, and signal spans from a given causal sentence. We model the task as a reading comprehension (RC) problem and apply a token-level RC-based span prediction paradigm to the task as the baseline. We explore different training objectives to fine-tune the model, as well as data augmentation (DA) tricks based on the language model (LM) for performance improvement. Additionally, we propose an efficient beam-search post-processing strategy to due with the drawbacks of span detection to obtain a further performance gain. Our approach achieves an average F1 score of 54.15 and ranks 1ˆst in the CASE competition. Our code is available at https://github.com/Gzhang-umich/1CademyTeamOfCASE.
Anthology ID:
2022.case-1.14
Volume:
Proceedings of the 5th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE)
Month:
December
Year:
2022
Address:
Abu Dhabi, United Arab Emirates (Hybrid)
Editors:
Ali Hürriyetoğlu, Hristo Tanev, Vanni Zavarella, Erdem Yörük
Venue:
CASE
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
100–105
Language:
URL:
https://aclanthology.org/2022.case-1.14
DOI:
10.18653/v1/2022.case-1.14
Bibkey:
Cite (ACL):
Xingran Chen, Ge Zhang, Adam Nik, Mingyu Li, and Jie Fu. 2022. 1Cademy @ Causal News Corpus 2022: Enhance Causal Span Detection via Beam-Search-based Position Selector. In Proceedings of the 5th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE), pages 100–105, Abu Dhabi, United Arab Emirates (Hybrid). Association for Computational Linguistics.
Cite (Informal):
1Cademy @ Causal News Corpus 2022: Enhance Causal Span Detection via Beam-Search-based Position Selector (Chen et al., CASE 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.case-1.14.pdf
Video:
 https://aclanthology.org/2022.case-1.14.mp4