SELECT T2.name ,  avg(T1.age) FROM Person AS T1 JOIN PersonFriend AS T2 ON T1.name  =  T2.friend GROUP BY T2.name ORDER BY avg(T1.age) DESC LIMIT 1
Which person whose friends have the oldest average age?
SELECT T2.name , avg ( T1.age ) FROM Person AS T1 JOIN PersonFriend AS T2 ON T1.name = T2.friend GROUP BY T2.name ORDER BY avg ( T1.age ) DESC LIMIT 1
select t2 . name , avg ( t1 . age ) from person as t1 join personfriend as t2 on t1 . name = t2 . friend group by t2 . name order by avg ( t1 . age ) desc limit value
Which person whose friends have the oldest average age ?