instruction: Class 746 has been taught by Prof. Beth Wilensky how many times ?
response: SELECT COUNT(*) FROM course, course_offering, instructor, offering_instructor WHERE course.course_id = course_offering.course_id AND course.number = 746 AND instructor.name LIKE '%Beth Wilensky%' AND offering_instructor.instructor_id = instructor.instructor_id AND offering_instructor.offering_id = course_offering.offering_id