Advancing document-level event extraction: Integration across texts and reciprocal feedback
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Published:2023
Issue:11
Volume:20
Page:20050-20072
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ISSN:1551-0018
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Container-title:Mathematical Biosciences and Engineering
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language:
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Short-container-title:MBE
Author:
Zuo Min12, Li Jiaqi12, Wu Di3, Wang Yingjun12, Dong Wei12, Kong Jianlei14, Hu Kang5
Affiliation:
1. National Engineering Research Centre for Agri-Product Quality Traceability, Beijing Technology and Business University, Beijing 100048, China 2. China Food Flavor and Nutrition Health Innovation Center, Beijing Technology and Business University, Beijing 100048, China 3. Beijing Academy of TCM Beauty Supplements Co., Ltd., Beijing 102401, China 4. Artificial Intelligence College, Beijing Technology and Business University, Beijing 100048, China 5. National Institutes for Food and Drug Control, Beijing 100050, China
Abstract
<abstract>
<p>The primary objective of document-level event extraction is to extract relevant event information from lengthy texts. However, many existing methods for document-level event extraction fail to fully incorporate the contextual information that spans across sentences. To overcome this limitation, the present study proposes a document-level event extraction model called Integration Across Texts and Reciprocal Feedback (IATRF). The proposed model constructs a heterogeneous graph and employs a graph convolutional network to enhance the connection between document and entity information. This approach facilitates the acquisition of semantic information enriched with document-level context. Additionally, a Transformer classifier is introduced to transform multiple event types into a multi-label classification task. To tackle the challenge of event argument recognition, this paper introduces the Reciprocal Feedback Argument Extraction strategy. Experimental results conducted on both our COSM dataset and the publicly available ChFinAnn dataset demonstrate that the proposed model outperforms previous methods in terms of F1 value, thus confirming its effectiveness. The IATRF model effectively solves the problems of long-distance document context-aware representation and cross-sentence argument dispersion.</p>
</abstract>
Publisher
American Institute of Mathematical Sciences (AIMS)
Subject
Applied Mathematics,Computational Mathematics,General Agricultural and Biological Sciences,Modeling and Simulation,General Medicine
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