Are the two objects in the rear the same shape and size?
return objects ;return #1 in the   rear ;return the   shapes of #2 ;return the   sizes of #2 ;return if  #3 are the   same ;return if  #4 are the   same ;return #5 and #6
['select', 'filter', 'project', 'project', 'boolean', 'boolean', 'union']