Find the name of physicians who are affiliated with both Surgery and Psychiatry departments.
select t1.name from physician as t1 join affiliated_with as t2 on t1.employeeid = t2.physician join department as t3 on t2.department = t3.departmentid where t3.name = 'Surgery' intersect select t1.name from physician as t1 join affiliated_with as t2 on t1.employeeid = t2.physician join department as t3 on t2.department = t3.departmentid where t3.name = 'Psychiatry'