Question: what is the date of attendance of the student is 121? | the date of attendance of the student with id 121 is 2012-04-09 11:44:34. | which student id attend english and french both course?
SQL: SELECT T2.student_id FROM courses AS T1 JOIN student_course_attendance AS T2 ON T1.course_id  =  T2.course_id WHERE T1.course_name  =  "English" intersect SELECT T2.student_id FROM courses AS T1 JOIN student_course_attendance AS T2 ON T1.course_id  =  T2.course_id WHERE T1.course_name  =  "French"