Joint extraction of entities and overlapping relations using source-target entity labeling
Expert Systems with Applications(2021)
摘要
•Joint extraction model of entities and overlapping relations is proposed.•Source-target BERT, based on pre-trained model, is used to assign entity labels.•OREM, a three-step model to extract the unlimited number of overlapping relations.•Proposed model on two public datasets exhibits greater effectiveness.
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关键词
BERT,Entity recognition,Overlapping relation extraction,Joint extraction model
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