of all the matte items, how many are yellow or purple?
return items ;return #1 that  are matte ;return #2 that  are yellow ;return #2 that  are purple ;return number of  #3 ;return number of  #4 ;return sum of #5 and #6
['select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']