Find the name and age of the person who is a friend of both Dan and Alice.
return person ;return #1 who  is  a friend of  Dan ;return #1 who  is  a friend of  Alice ;return #1 in both #2 and #3 ;return name of  #4 ;return age of  #4 ;return #5 ,   #6
['select', 'filter', 'filter', 'intersection', 'project', 'project', 'union']