query: SELECT id FROM Highschooler EXCEPT SELECT student_id FROM Friend
question: What are the ids of high school students do not have no friends?
query_toks: SELECT id FROM Highschooler EXCEPT SELECT student_id FROM Friend
query_toks_no_value: select id from highschooler except select student_id from friend
question_toks: What are the ids of high school students do not have no friends?