What is the position in the faculty of the professor who teaches the highest number of courses?
position in the faculty refers to hasPosition; professor refers to professor = 1; teaches the highest number of courses refers to max(count(taughtBy.course_id))
SELECT T1.hasPosition FROM person AS T1 INNER JOIN taughtBy AS T2 ON T1.p_id = T2.p_id WHERE T1.professor = 1 GROUP BY T1.p_id ORDER BY COUNT(T2.course_id) DESC LIMIT 1