Table schema:
CREATE TABLE department (dept_code VARCHAR, dept_name VARCHAR); CREATE TABLE professor (prof_office VARCHAR, emp_num VARCHAR, dept_code VARCHAR, prof_high_degree VARCHAR); CREATE TABLE employee (emp_fname VARCHAR, emp_num VARCHAR)

Question: Find the first name and office of the professor who is in the history department and has a Ph.D. degree.
SQL: SELECT T1.emp_fname, T2.prof_office FROM employee AS T1 JOIN professor AS T2 ON T1.emp_num = T2.emp_num JOIN department AS T3 ON T3.dept_code = T2.dept_code WHERE T3.dept_name = 'History' AND T2.prof_high_degree = 'Ph.D.'