query: SELECT title FROM course WHERE course_id NOT IN (SELECT course_id FROM prereq)
question: Find that name the course that do not have any prerequisite?
query_toks: SELECT title FROM course WHERE course_id NOT IN ( SELECT course_id FROM prereq )
query_toks_no_value: select title from course where course_id not in ( select course_id from prereq )
question_toks: Find that name the course that do not have any prerequisite?