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IEICE TRANSACTIONS on Information

MKGN: A Multi-Dimensional Knowledge Enhanced Graph Network for Multi-Hop Question and Answering

Ying ZHANG, Fandong MENG, Jinchao ZHANG, Yufeng CHEN, Jinan XU, Jie ZHOU

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Summary :

Machine reading comprehension with multi-hop reasoning always suffers from reasoning path breaking due to the lack of world knowledge, which always results in wrong answer detection. In this paper, we analyze what knowledge the previous work lacks, e.g., dependency relations and commonsense. Based on our analysis, we propose a Multi-dimensional Knowledge enhanced Graph Network, named MKGN, which exploits specific knowledge to repair the knowledge gap in reasoning process. Specifically, our approach incorporates not only entities and dependency relations through various graph neural networks, but also commonsense knowledge by a bidirectional attention mechanism, which aims to enhance representations of both question and contexts. Besides, to make the most of multi-dimensional knowledge, we investigate two kinds of fusion architectures, i.e., in the sequential and parallel manner. Experimental results on HotpotQA dataset demonstrate the effectiveness of our approach and verify that using multi-dimensional knowledge, especially dependency relations and commonsense, can indeed improve the reasoning process and contribute to correct answer detection.

Publication
IEICE TRANSACTIONS on Information Vol.E105-D No.4 pp.807-819
Publication Date
2022/04/01
Publicized
2021/12/29
Online ISSN
1745-1361
DOI
10.1587/transinf.2021EDP7154
Type of Manuscript
PAPER
Category
Natural Language Processing

Authors

Ying ZHANG
  Beijing Jiaotong University
Fandong MENG
  Tecent Inc
Jinchao ZHANG
  Tecent Inc
Yufeng CHEN
  Beijing Jiaotong University
Jinan XU
  Beijing Jiaotong University
Jie ZHOU
  Tecent Inc

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