20. The computer-readable medium as recited in claim 18 , wherein the instructions for determining a relevance of each one of a plurality of lines of text of a document based upon the intent of the query, content of the query, and content of each of the plurality of lines of text comprises: instructions for determining a query-independent relevance of each of the plurality of lines of text in the document; instructions for determining a query-dependent relevance of each of the plurality of lines of text in the document; and instructions for calculating the relevance of each one of the plurality of lines of text based upon the intent of the query, the query independent relevance of the one of the plurality of lines of text in the document and the query dependent relevance of the one of the plurality of lines of text in the document.
21. The computer-readable medium as recited in claim 20 , wherein determining a query-independent relevance of each of the plurality of lines of text in the document includes identifying a set of one or more query-independent features in each of the plurality of lines of text in the document, and wherein determining a query-dependent relevance of each of the plurality of lines of text in the document includes identifying a set of one or more query-dependent features in each of the plurality of lines of text in the document.