Task: Text to Code
Input (English): SQL: SELECT title FROM course WHERE title = "Mobile Computing"
Feedback: Make sure prerequisite for course's title equals Mobile Computing .
Output (English): SELECT title FROM course WHERE course_id IN (SELECT T1.prereq_id FROM prereq AS T1 JOIN course AS T2 ON T1.course_id  =  T2.course_id WHERE T2.title  =  'Mobile Computing')