How many gray objects are the same material as the closest brown cylinder?
return gray objects ;return brown cylinder ;return #2 closest to  #1 ;return materials of #1 ;return materials of #3 ;return #1 where #4 is  the  same as #5 ;return number of  #6
['select', 'select', 'filter', 'project', 'project', 'comparative', 'aggregate']