Specifically, given a question, a set of queries generated by searchers attempting to answer this question, and a set of documents retrieved by a search engine for each of the queries, our goal to retrieve a set of passages that contain correct answers for the question.
our goal is to identify, from searcher behavior, the passages in the documents most likely to contain correct answers to a question, which could then be incorporated into a fully automated question answering system, or returned to the user directly, for example, by incorporating these passages into the result abstracts or "snippets".