query: SELECT COUNT(*) FROM weather WHERE mean_humidity  >  50 AND mean_visibility_miles  >  8
question: How many days one both mean humidity 50 and are meaning visibility 8?
query_toks: SELECT COUNT ( * ) FROM weather WHERE mean_humidity > 50 AND mean_visibility_miles > 8
query_toks_no_value: select count ( * ) from weather where mean_humidity > value and mean_visibility_miles > value
question_toks: How many days one both mean humidity 50 and are meaning visibility 8?