If in one of the pictures of the pair, a red vending machine stands between a white machine and a black machine.
return vending machine  ;return #1 that is red ;return #1 that is white ;return #1 that is black ;return #2 that stands between both  #3 and #4 ;return if  #5 is in  one of the  pictures
['select', 'filter', 'filter', 'filter', 'intersection', 'boolean']