Question: Thanks!  Can you show me the average age of the students living in each of these dorms?
SQL: SELECT avg ( T1.age )  ,  T3.dorm_name FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid   =   T2.stuid JOIN dorm AS T3 ON T3.dormid   =   T2.dormid GROUP BY T3.dorm_name