query: SELECT classroom ,  count(*) FROM list WHERE grade  =  "0" GROUP BY classroom
question: For each grade 0 classroom, are reporting the total number of students.
query_toks: SELECT classroom , count ( * ) FROM list WHERE grade = `` 0 '' GROUP BY classroom
query_toks_no_value: select classroom , count ( * ) from list where grade = value group by classroom
question_toks: For each grade 0 classroom, are reporting the total number of students.