RUCIR at NTCIR-12 IMINE-2 Task

In this paper, we present our participation in the Query Understanding subtask and the Vertical Incorporating subtask of the NTCIR-12 IMine-2 task, for both English and Chinese topics. In the Query Understanding subtask, we combine the extracted candidates from search engine suggestions and Wikipeida, and classify their verticals after clustering and ranking them. In the Vertical Incorporating subtask, we provide a general method for adapting traditional diversity algorithms to deal with predefined subtopics with classified verticals in diversification.