33. The system of claim 30 , wherein the one or more processors are further configured to execute the stored instructions to cause the system to suggest the phrase extension to the user to use in the query.
33. The system of claim 30 , wherein the one or more processors are further configured to execute the stored instructions to cause the system to suggest the phrase extension to the user to use in the query. 34. The system of claim 33 , wherein the suggested phrase extension is selected from a plurality of phrase extensions of the identified phrase, based on information gains of the plurality of phrase extensions given the identified phrase.