How many other objects are the same color as the farthest sphere in the back?
return spheres ;return #1 that  are farthest in  the   back ;return objects ;return #3 besides #2 ;return the   color of #2 ;return colors of #4 ;return #4 where  #6 is  the   same as #5 ;return number of #7
['select', 'filter', 'select', 'discard', 'project', 'project', 'comparative', 'aggregate']