BUPTTeam Participation at TAC 2012 Knowledge Base Population

This paper overviews BUPTTeam’s participation in the Entity Linking task at TAC 2012. In this paper we propose a method to link the queries and KB entries based on four steps: 1) query expansion, 2) candidates generation, 3) candidates ranking, 4) clustering. In the initial stage, we expand the queries from the background documents using the defined rules. We generate in the knowledge base according to the expansions. In entity linking, the most crucial step is ranking the KB candidates and selection the best node. In ranking stage, we use some features to find the best node. For a topranked node, we need to detect it whether is the corresponding KB entry. We target the node which is not in the knowledge base as “NILxxxx” and cluster them. The evaluation results show that our method is effective for RTE task.