If one image shows an all-black metal gate with hinges on the left and the latch on the right.
return gate ;return #1 that is all-black ;return #2 that is metal ;return hinges of #3 ;return #3 where  #4 are on the  left ;return the  latch of #3 ;return #3 where  #6 is on the  right ;return #3 in  both  #5 and #7 ;return if  #8 is in  one image
['select', 'filter', 'filter', 'project', 'comparative', 'project', 'comparative', 'intersection', 'boolean']