is the smallestt ball the same material as the remaining shapes that are not spheres?
return shapes ;return spheres ;return size of #2 ;return #2 where #3 is lowest ;return material of #4 ;return #1 besides  #2 ;return material of  #6 ;return is #5 the  same as #7
['select', 'select', 'project', 'superlative', 'project', 'discard', 'project', 'boolean']