How many object share the shape of the yellow object between two spheres?
return spheres ;return the  yellow object  between two of #1 ;return objects besides  #2 ;return shape of #2 ;return shapes of #3 ;return #3 where #5 is the  same as #4 ;return number of  #6
['select', 'project', 'discard', 'project', 'project', 'comparative', 'aggregate']