Publication Type

Journal Article

Version

publishedVersion

Publication Date

6-2023

Abstract

At present, the entity and relation joint extraction task has attracted more and more scholars' attention in the field of natural language processing (NLP). However, most of their methods rely on NLP tools to construct dependency trees to obtain sentence structure information. The adjacency matrix constructed by the dependency tree can convey syntactic information. Dependency trees obtained through NLP tools are too dependent on the tools and may not be very accurate in contextual semantic description. At the same time, a large amount of irrelevant information will cause redundancy. This paper presents a novel end-to-end entity and relation joint extraction based on the multi-head attention graph convolutional network model (MAGCN), which does not rely on external tools. MAGCN generates an adjacency matrix through a multi-head attention mechanism to form an attention graph convolutional network model, uses head selection to identify multiple relations, and effectively improve the prediction result of overlapping relations. The authors extensively experiment and prove the method's effectiveness on three public datasets: NYT, WebNLG, and CoNLL04. The results show that the authors' method outperforms the state-of-the-art research results for the task of entities and relation extraction.

Keywords

Information retrieval, Natural language processing

Discipline

Artificial Intelligence and Robotics | Programming Languages and Compilers

Research Areas

Intelligent Systems and Optimization

Areas of Excellence

Digital transformation

Publication

CAAI Transactions on Intelligence Technology

Volume

8

Issue

2

First Page

468

Last Page

477

ISSN

2468-6557

Identifier

10.1049/cit2.12086

Publisher

Wiley

Additional URL

https://doi.org/10.1049/cit2.12086

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