Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE prereq (title VARCHAR, course_id VARCHAR); CREATE TABLE course (title VARCHAR, course_id VARCHAR)
### Question:
Find the name of the courses that do not have any prerequisite?
### Answer:
SELECT title FROM course WHERE NOT course_id IN (SELECT course_id FROM prereq)