A multi-feature fusion model for Chinese relation extraction with entity sense

摘要

Relation extraction is an important task of information extraction. Most existing methods of Chinese language relation extraction are based on word input. They are highly dependent on the quality of word segmentation and suffer from the ambiguity of polysemic words. Therefore, a multi-feature fusion model is presented on the basis of character input, which integrates character-level features, word-level features and entity sense features into deep neural network models. Specifically, to alleviate the ambiguity of polysemy, the entity sense is introduced as external language knowledge to provide supplementary information for understanding the semantics of an entity in a given sentence. The Attention-Based Bidirectional Long Short-Term Memory Networks (Att-BLSTM) are proposed to capture features at the character level. To obtain more structural information, the convolutional layer (C-AttBLSTM) is built upon the Att-BLSTM to capture features at the word level. Experiments are conducted on a public dataset of SanWen, and show that the proposed model achieves state-of-the-art results. (C) 2020 The Authors. Published by Elsevier B.V.