How many other objects are made of the same material as the red sphere?
return objects ;return red sphere ;return #1 besides  #2 ;return material of #2 ;return material of #3 ;return #3 where #5 is  the same as #4 ;return number of  #6
['select', 'select', 'discard', 'project', 'project', 'comparative', 'aggregate']