Question: Find the first name of students who are living in the dorm that has most number of amenities.
SQL: SELECT T1.fname FROM student AS T1 JOIN lives_in AS T2 ON T1.stuid  =  T2.stuid WHERE T2.dormid IN (SELECT T2.dormid FROM dorm AS T3 JOIN has_amenity AS T4 ON T3.dormid  =  T4.dormid JOIN dorm_amenity AS T5 ON T4.amenid  =  T5.amenid GROUP BY T3.dormid ORDER BY count(*) DESC LIMIT 1)