Task: Text to Code
Input (English): SQL: SELECT title FROM course
Feedback: Also indicate that course's prerequisite course name equals Differential Geometry .
Output (English): SELECT title FROM course WHERE course_id IN (SELECT T1.course_id FROM prereq AS T1 JOIN course AS T2 ON T1.prereq_id  =  T2.course_id WHERE T2.title  =  'Differential Geometry')