What is the membership card held by both members living in Hartford and ones living in Waterbury address?
return members ;return addresses of  #1 ;return #1 where #2 is  in Hartford ;return #1 where #2 is  in Waterbury ;return #1 of  both #3 and  #4 ;return membership card held by #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'project']