Find instructors who taught the same course the most number of consecutive years. Answer in relational algebra and SQL.

classroom(building, room number, capacity) department(dept name, building, budget) courselcourse id,fitle, dept.name, credits) instructor(ID, name, dept name, salary) section course id, sec id, semester, year, building, room.number, time.slotid) teaches(ID, course id, sec id, semester year) student (ID, name, dept name, tot.cred) takes(ID, course id, sec id, semester, year, grade) advisor(SID, ID) time slot(time slot id, day start fime, end.time) prereq(course id prereq id)