Are all of the metallic objects the same shapes?
return objects ;return #1 that are metallic ;return shapes of #2 ;return number of  #2 for each #3 ;return the  highest of #4 ;return number of  #2 ;return if #5 is equal to #6
['select', 'filter', 'project', 'group', 'aggregate', 'aggregate', 'boolean']