Question: Thank you. What are the office extensions numbers of professor Donelly and Blalock please?
SQL: SELECT T3.DEPT_EXTENSION FROM employee AS T1 JOIN professor AS T2 ON T1.emp_num   =   T2.emp_num JOIN department AS T3 ON T2.dept_code   =   T3.dept_code WHERE EMP_LNAME = "Donelly" or  EMP_LNAME = "Blalock"