What are the names of customers who have taken both Mortgage and Auto loans?
return customers ;return loans #1 have  taken ;return #1 where #2 is  Mortgage ;return #1 where #2 is  Auto ;return #1 of  both #3 and  #4 ;return names of  #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'project']