query: SELECT T2.emp_fname FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num  =  T2.emp_num GROUP BY T1.prof_num HAVING count(*)  >  1
question: What-all are the first name of all professors teach more than one clases?
query_toks: SELECT T2.emp_fname FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num = T2.emp_num GROUP BY T1.prof_num HAVING count ( * ) > 1
query_toks_no_value: select t2 . emp_fname from class as t1 join employee as t2 on t1 . prof_num = t2 . emp_num group by t1 . prof_num having count ( * ) > value
question_toks: What-all are the first name of all professors teach more than one clases?