13. A computer readable storage medium having computer-executable instructions for evaluating a semantic proximity between a question consisting of a string of natural language text presented in a candidate free-form text request received from a user, and a reference free-form text entry consisting of a string of natural language text, comprising: providing a plurality of reference free-form text entries in a data store, each entry in the form of a question expressed as a string of natural language text associated with an answer to the question; receiving a candidate free-form text request from a user work station in the form of a query expressed as a string of natural language text; processing the string of natural language text expressed in each reference free-form text entry into a plurality of reference rephrased objects, each reference rephrased object containing a variation of the string of natural language text expressed in the reference free-form text entry and an expression of the semantic proximity between the variation of the string of natural language text contained in the reference rephrased object and the string of natural language text expressed in the reference free-form text entry; processing the string of natural language text expressed in the candidate free-form text request into a plurality of user rephrased objects, each user rephrased object containing a variation of the string of natural language text expressed in the candidate free-form text request and an expression of the semantic proximity between the variation of the string of natural language text contained in the user rephrased object and the string of natural language text expressed in the candidate free-form text request; matching at least one of the reference rephrased objects derived from the processing of the reference free-form text entry with at least one user rephrased objects derived from the processing of the candidate free-form text request; and calculating a combined semantic proximity for each matching reference rephrased object and user rephrased object.
13. A computer readable storage medium having computer-executable instructions for evaluating a semantic proximity between a question consisting of a string of natural language text presented in a candidate free-form text request received from a user, and a reference free-form text entry consisting of a string of natural language text, comprising: providing a plurality of reference free-form text entries in a data store, each entry in the form of a question expressed as a string of natural language text associated with an answer to the question; receiving a candidate free-form text request from a user work station in the form of a query expressed as a string of natural language text; processing the string of natural language text expressed in each reference free-form text entry into a plurality of reference rephrased objects, each reference rephrased object containing a variation of the string of natural language text expressed in the reference free-form text entry and an expression of the semantic proximity between the variation of the string of natural language text contained in the reference rephrased object and the string of natural language text expressed in the reference free-form text entry; processing the string of natural language text expressed in the candidate free-form text request into a plurality of user rephrased objects, each user rephrased object containing a variation of the string of natural language text expressed in the candidate free-form text request and an expression of the semantic proximity between the variation of the string of natural language text contained in the user rephrased object and the string of natural language text expressed in the candidate free-form text request; matching at least one of the reference rephrased objects derived from the processing of the reference free-form text entry with at least one user rephrased objects derived from the processing of the candidate free-form text request; and calculating a combined semantic proximity for each matching reference rephrased object and user rephrased object. 14. The computer readable storage medium of claim 13 , further comprising: providing a reference answer to the user based on calculating the combined semantic proximity associated with each matching reference rephrased object and user rephrased object.