query: SELECT student_id FROM student_course_attendance WHERE course_id  =  301
question: Who what a imight would student them had registered em course 301?
query_toks: SELECT student_id FROM student_course_attendance WHERE course_id = 301
query_toks_no_value: select student_id from student_course_attendance where course_id = value
question_toks: Who what a imight would student them had registered em course 301?