CREATE TABLE instructor (id CLOB, name CLOB, dept_name CLOB, salary NUMBER)
CREATE TABLE department (dept_name CLOB, building CLOB, budget NUMBER)
CREATE TABLE teaches (id CLOB, course_id CLOB, sec_id CLOB, semester CLOB, year NUMBER)
CREATE TABLE course (course_id CLOB, title CLOB, dept_name CLOB, credits NUMBER)
CREATE TABLE time_slot (time_slot_id CLOB, day CLOB, start_hr NUMBER, start_min NUMBER, end_hr NUMBER, end_min NUMBER)
CREATE TABLE advisor (s_id CLOB, i_id CLOB)
CREATE TABLE student (id CLOB, name CLOB, dept_name CLOB, tot_cred NUMBER)
CREATE TABLE takes (id CLOB, course_id CLOB, sec_id CLOB, semester CLOB, year NUMBER, grade CLOB)
CREATE TABLE prereq (course_id CLOB, prereq_id CLOB)
CREATE TABLE section (course_id CLOB, sec_id CLOB, semester CLOB, year NUMBER, building CLOB, room_number CLOB, time_slot_id CLOB)
CREATE TABLE classroom (building CLOB, room_number CLOB, capacity NUMBER)

What is the title of the course with Differential Geometry as a prerequisite?
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')
WITH "_u_0" AS (SELECT "T1"."course_id" FROM "prereq" "T1" JOIN "course" "T2" ON "T1"."prereq_id" = "T2"."course_id" AND "T2"."title" = 'Differential Geometry' GROUP BY "course_id") SELECT "title" FROM "course" LEFT JOIN "_u_0" "_u_0" ON "_u_0"."" = "course_id" WHERE NOT "_u_0"."" IS NULL