query: SELECT count(*) FROM people WHERE is_male  =  'F' AND age  >  30
question: How many female persons like older as 30 in our record?
query_toks: SELECT count ( * ) FROM people WHERE is_male = 'F ' AND age > 30
query_toks_no_value: select count ( * ) from people where is_male = value and age > value
question_toks: How many female persons like older as 30 in our record?