University of Hyogo at NTCIR-11 TaskMine by Dependency Parsing

Our method for TaskMine consists of three steps. Firstly, we search for seed Web pages by using the query string with a word houhou , which means method . We collect more pages in consideration of the anchor texts in the seed pages. Then, we nd pairs of chunks satisfying prede ned patterns by dependency parsing on the sentences. We extract a target and a postpositional particle from a depending chunk, and extract an operation and a negation (if it exists) from a depended chunk. We regard a quadruplet of them as a subtask. Finally, we rank the extracted subtasks by their frequency based score.