What is the color of the only two objects with the same shape and color?
return objects ;return shapes of #1 ;return colors of #1 ;return #1 where #2 is  the same ;return #1 where #3 is  the same ;return #1 in both #4 and  #5 ;return color  of #6
['select', 'project', 'project', 'comparative', 'comparative', 'intersection', 'project']