query: SELECT title FROM course WHERE dept_name  =  'Statistics' EXCEPT SELECT title FROM course WHERE dept_name  =  'Psychology'
question: What-what of courses that are in the Statistics department but not the Psychology department are the titles?
query_toks: SELECT title FROM course WHERE dept_name = 'Statistics ' EXCEPT SELECT title FROM course WHERE dept_name = 'Psychology '
query_toks_no_value: select title from course where dept_name = value except select title from course where dept_name = value
question_toks: What-what of courses that are in the Statistics department but not the Psychology department are the titles?