Are the two large balls both rubber and blue?
return balls ;return #1 that  are large ;return two of #2 ;return #3 that  are rubber ;return #3 that  are blue ;return #1 of both #4 and  #5 ;return if  there  is  #6
['select', 'filter', 'project', 'filter', 'filter', 'intersection', 'boolean']