Question: Find the id and last name of the teacher that has the most detentions with detention type code "AFTER"?
SQL: SELECT T1.teacher_id ,  T2.last_name FROM Detention AS T1 JOIN Teachers AS T2 ON T1.teacher_id  =  T2.teacher_id WHERE T1.detention_type_code  =  "AFTER" GROUP BY T1.teacher_id ORDER BY count(*) DESC LIMIT 1