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Knowledge bases such as Wikipedia have been shown to be effective to improve the performance in many information tasks. Clearly, the effectiveness is based upon the quality of these knowledge bases. A high-quality knowledge base should have up-to-date complete information. However, constructing a high-quality knowledge base is not an easy task because it would require significant manual efforts to collect relevant documents, extract valuable information and update the knowledge basesdoi:10.1145/2512405.2512407 dblp:conf/cikm/LiuF13 fatcat:rjy2v36pbzabxmecvd4i44h44u