Generative Emotion Cause Triplet Extraction in Conversations with Commonsense Knowledge

Fanfan Wang, Jianfei Yu, Rui Xia


Abstract
Emotion Cause Triplet Extraction in Conversations (ECTEC) aims to simultaneously extract emotion utterances, emotion categories, and cause utterances from conversations. However, existing studies mainly decompose the ECTEC task into multiple subtasks and solve them in a pipeline manner. Moreover, since conversations tend to contain many informal and implicit expressions, it often requires external knowledge and reasoning-based inference to accurately identify emotional and causal clues implicitly mentioned in the context, which are ignored by previous work. To address these limitations, in this paper, we propose a commonSense knowledge-enHanced generAtive fRameworK named SHARK, which formulates the ECTEC task as an index generation problem and generates the emotion-cause-category triplets in an end-to-end manner with a sequence-to-sequence model. Furthermore, we propose to incorporate both retrieved and generated commonsense knowledge into the generative model via a dual-view gate mechanism and a graph attention layer. Experimental results show that our SHARK model consistently outperforms several competitive systems on two benchmark datasets. Our source codes are publicly released at https://github.com/NUSTM/SHARK.
Anthology ID:
2023.findings-emnlp.260
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2023
Month:
December
Year:
2023
Address:
Singapore
Editors:
Houda Bouamor, Juan Pino, Kalika Bali
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
3952–3963
Language:
URL:
https://aclanthology.org/2023.findings-emnlp.260
DOI:
10.18653/v1/2023.findings-emnlp.260
Bibkey:
Cite (ACL):
Fanfan Wang, Jianfei Yu, and Rui Xia. 2023. Generative Emotion Cause Triplet Extraction in Conversations with Commonsense Knowledge. In Findings of the Association for Computational Linguistics: EMNLP 2023, pages 3952–3963, Singapore. Association for Computational Linguistics.
Cite (Informal):
Generative Emotion Cause Triplet Extraction in Conversations with Commonsense Knowledge (Wang et al., Findings 2023)
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PDF:
https://aclanthology.org/2023.findings-emnlp.260.pdf