Find the physicians who are trained in a procedure that costs more than 5000.
SELECT T1.name FROM physician AS T1 JOIN trained_in AS T2 ON T1.employeeid  =  T2.physician JOIN procedures AS T3 ON T3.code  =  T2.treatment WHERE T3.cost  >  5000
5000'den fazla bir prosedürde eğitilmiş doktorları bulun.