SELECT T1.name ,  T1.age FROM Person AS T1 JOIN PersonFriend AS T2 ON T1.name  =  T2.name WHERE T2.friend  =  'Dan' INTERSECT SELECT T1.name ,   T1.age FROM Person AS T1 JOIN PersonFriend AS T2 ON T1.name  =  T2.name WHERE T2.friend  =  'Alice'
Find the name and age of the person who is a friend of both Dan and Alice.
SELECT T1.name , T1.age FROM Person AS T1 JOIN PersonFriend AS T2 ON T1.name = T2.name WHERE T2.friend = 'Dan ' INTERSECT SELECT T1.name , T1.age FROM Person AS T1 JOIN PersonFriend AS T2 ON T1.name = T2.name WHERE T2.friend = 'Alice '
select t1 . name , t1 . age from person as t1 join personfriend as t2 on t1 . name = t2 . name where t2 . friend = value intersect select t1 . name , t1 . age from person as t1 join personfriend as t2 on t1 . name = t2 . name where t2 . friend = value
Find the name and age of the person who is a friend of both Dan and Alice .