How many objects have the same finish as the purple objects?
return objects ;return #1 that  are purple ;return finishes of #2 ;return #1 besides #2 ;return finishes of #4 ;return #4 where #5 is  the  same as #3 ;return number of  #6
['select', 'filter', 'project', 'discard', 'project', 'comparative', 'aggregate']