query: SELECT count(*) FROM department WHERE department_id NOT IN (SELECT department_id FROM management);
question: How many department led by head who are not mentioned?
query_toks: SELECT count ( * ) FROM department WHERE department_id NOT IN ( SELECT department_id FROM management ) ;
query_toks_no_value: select count ( * ) from department where department_id not in ( select department_id from management )
question_toks: How many department led by head who are not mentioned?