16. The system of claim 11 , wherein applying the plurality of scoring factors for each candidate query rewrite further comprises determining whether the search query includes a referential term of a particular type.
16. The system of claim 11 , wherein applying the plurality of scoring factors for each candidate query rewrite further comprises determining whether the search query includes a referential term of a particular type. 17. The system of claim 16 , wherein a score of a candidate query rewrite is increased in response to determining that the candidate query rewrite includes an entity of the particular type.