As we said before in Question Answering System Phases that the second phase in an question answering system is passage retrieval. A query would be pass to GOOGLE to become documents that should contain the answer.It is recommended to pass a well formed query, so we will use GOOGLE advanced search to get a well formed query.
Some advanced Google search tips:
Google ignores common words and characters such as where, the, how, and other digits and letters which slow down your search without improving the results. We'll indicate if a word has been excluded by displaying details on the results page below the search box.
