30. The method of claim 29 , wherein identifying the particular subject matter based on the first search results further comprises: identifying a keyword associated with the particular subject matter; and determining that the keyword occurs in the resources that the search engine has identified.
29. The method of claim 1 , further comprising: identifying, by the search engine, the resources from a corpus of resources that are responsive to the search query; identifying the particular subject matter based on the first results; and selecting the particular collection of records from among the multiple collection of records.