A Symmetric Local Search Network for Emotion-Cause Pair Extraction

Zifeng Cheng, Zhiwei Jiang, Yafeng Yin, Hua Yu, Qing Gu

Abstract
Emotion-cause pair extraction (ECPE) is a new task which aims at extracting the potential clause pairs of emotions and corresponding causes in a document. To tackle this task, a two-step method was proposed by previous study which first extracted emotion clauses and cause clauses individually, then paired the emotion and cause clauses, and filtered out the pairs without causality. Different from this method that separated the detection and the matching of emotion and cause into two steps, we propose a Symmetric Local Search Network (SLSN) model to perform the detection and matching simultaneously by local search. SLSN consists of two symmetric subnetworks, namely the emotion subnetwork and the cause subnetwork. Each subnetwork is composed of a clause representation learner and a local pair searcher. The local pair searcher is a specially-designed cross-subnetwork component which can extract the local emotion-cause pairs. Experimental results on the ECPE corpus demonstrate the superiority of our SLSN over existing state-of-the-art methods.
Anthology ID:
2020.coling-main.12
Volume:
Proceedings of the 28th International Conference on Computational Linguistics
Month:
December
Year:
2020
Address:
Barcelona, Spain (Online)
Editors:
Donia Scott, Nuria Bel, Chengqing Zong
Venue:
COLING
SIG:
Publisher:
International Committee on Computational Linguistics
Note:
Pages:
139–149
Language:
URL:
https://aclanthology.org/2020.coling-main.12
DOI:
10.18653/v1/2020.coling-main.12
Bibkey:
Cite (ACL):
Zifeng Cheng, Zhiwei Jiang, Yafeng Yin, Hua Yu, and Qing Gu. 2020. A Symmetric Local Search Network for Emotion-Cause Pair Extraction. In Proceedings of the 28th International Conference on Computational Linguistics, pages 139–149, Barcelona, Spain (Online). International Committee on Computational Linguistics.
Cite (Informal):
A Symmetric Local Search Network for Emotion-Cause Pair Extraction (Cheng et al., COLING 2020)
Copy Citation:
PDF:
https://preview.aclanthology.org/nschneid-patch-4/2020.coling-main.12.pdf
Code
 zifengcheng/SLSN
Data
ECE, Xia and Ding, 2019
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