There are three small balls; how many of them are the same material as the small blue cube?
return balls ;return size of #1 ;return #1 where #2 is small  ;return cubes ;return #4 that are blue ;return size of #5 ;return #5 where #6 is small  ;return material of #3 ;return materials of #7 ;return number of  #3 where #8 is the  same as #9
['select', 'project', 'comparative', 'select', 'filter', 'project', 'comparative', 'project', 'project', 'None']