query: SELECT count(*) ,  class_room FROM CLASS GROUP BY class_room HAVING count(*)  >=  2
question: Find the number of classes a-offered for all class rooms hold at least 2 classes.
query_toks: SELECT count ( * ) , class_room FROM CLASS GROUP BY class_room HAVING count ( * ) > = 2
query_toks_no_value: select count ( * ) , class_room from class group by class_room having count ( * ) > = value
question_toks: Find the number of classes a-offered for all class rooms hold at least 2 classes.