query: SELECT T2.emp_fname ,  T3.crs_description FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num  =  T2.emp_num JOIN course AS T3 ON T1.crs_code  =  T3.crs_code
question: What-all the first names of all teachers which done taught a course and the corresponding descriptions?
query_toks: SELECT T2.emp_fname , T3.crs_description FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num = T2.emp_num JOIN course AS T3 ON T1.crs_code = T3.crs_code
query_toks_no_value: select t2 . emp_fname , t3 . crs_description from class as t1 join employee as t2 on t1 . prof_num = t2 . emp_num join course as t3 on t1 . crs_code = t3 . crs_code
question_toks: What-all the first names of all teachers which done taught a course and the corresponding descriptions?