query: SELECT count(DISTINCT student_id) FROM Student_Course_Enrolment
question: How many distinct students are a-enrolled in courses?
query_toks: SELECT count ( DISTINCT student_id ) FROM Student_Course_Enrolment
query_toks_no_value: select count ( distinct student_id ) from student_course_enrolment
question_toks: How many distinct students are a-enrolled in courses?