How many objects are red rubber things and purple spheres?
return objects ;return #1 that  are red ;return #2 that  are rubber ;return #1 that  are purple ;return #4 that  are spheres ;return number of #3 ;return number of #5 ;return sum of #6 and #7
['select', 'filter', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']