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RAAT: Relation-Augmented Attention Transformer for Relation Modeling in Document-Level Event Extraction

2022-06-07 15:11:42
Yuan Liang, Zhuoxuan Jiang, Di Yin, Bo Ren

Abstract

In document-level event extraction (DEE) task, event arguments always scatter across sentences (across-sentence issue) and multiple events may lie in one document (multi-event issue). In this paper, we argue that the relation information of event arguments is of great significance for addressing the above two issues, and propose a new DEE framework which can model the relation dependencies, called Relation-augmented Document-level Event Extraction (ReDEE). More specifically, this framework features a novel and tailored transformer, named as Relation-augmented Attention Transformer (RAAT). RAAT is scalable to capture multi-scale and multi-amount argument relations. To further leverage relation information, we introduce a separate event relation prediction task and adopt multi-task learning method to explicitly enhance event extraction performance. Extensive experiments demonstrate the effectiveness of the proposed method, which can achieve state-of-the-art performance on two public datasets. Our code is available at https://github. com/TencentYoutuResearch/RAAT.

Abstract (translated)

URL

https://arxiv.org/abs/2206.03377

PDF

https://arxiv.org/pdf/2206.03377.pdf


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