中国科学院自动化研究所机构知识库

Entity Set Expansion is one of the important problems in Open Information Extraction.Entity Set Expan- sion refers to expanding several given seds of one concept into a more complete set.Most approaches solve the problem by using context or distributional information，sufering from the limitation of sed ambiguity problem which results in poor results.In this paper we present a novel method which introduces the semantic knowledge by leveraging Wikipedia knowledge base.We combine this method with traditional template based method.Experiment results show that the proposed method improves 18.5% in precision，6.8% in recal and 22.8% in MAP.