What number of objects are not spheres or purple?
return objects ;return #1 that  are spheres ;return #1 besides #2 ;return #1 that  are purple ;return #1 besides #4 ;return #3 ,  #5 ;return the  number of  #6
['select', 'filter', 'discard', 'filter', 'discard', 'union', 'aggregate']