Are any of the spheres of the same material as the purple cube?
return spheres ;return purple cube ;return material of #1 ;return material of #2 ;return #1 where #3 is  the   same as #4 ;return number of  #5 ;return if #6 is  higher than zero
['select', 'select', 'project', 'project', 'comparative', 'aggregate', 'boolean']