A computer-based search engine for performing a search for a keyword, comprising a result responsive to a search, a database comprising a plurality of terms organized by categories wherein at least one of the categories includes the keyword, and relational ones of the plurality of terms to the keyword; a heuristic engine comprising a plurality of rules which, when executed by a processor, applies the rules in accordance with the relational ones of the plurality of terms to a networked site to assess the keyword as a primary subject of the networked site.