Find the first names and offices of all instructors who have taught some course and the course description and the department name.
select t2.emp_fname, t4.prof_office, t3.crs_description, t5.dept_name 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 join professor as t4 on t2.emp_num = t4.emp_num join department as t5 on t4.dept_code = t5.dept_code