query: SELECT count(*) FROM Has_allergy WHERE Allergy  =  "Cat"
question: How students many do have a cat allergy?
query_toks: SELECT count ( * ) FROM Has_allergy WHERE Allergy = `` Cat ''
query_toks_no_value: select count ( * ) from has_allergy where allergy = value
question_toks: How students many do have a cat allergy?