query: SELECT grade ,  count(DISTINCT classroom) ,  count(*) FROM list GROUP BY grade
question: For each grade, report the grade, the number of classrooms in which it is taught and the total number of students in the grade.
query_toks: SELECT grade , count ( DISTINCT classroom ) , count ( * ) FROM list GROUP BY grade
query_toks_no_value: select grade , count ( distinct classroom ) , count ( * ) from list group by grade
question_toks: For each grade, report the grade, the number of classrooms in which it is taught and the total number of students in the grade.