if fifty percent of the items shown are blue, and fifty percent are also matte, does that mean that fifty percent are matte and blue?
return items ;return #1 that are   blue ;return #2 that are   matte  ;return #1 besides  #3 ;return number of  #3 ;return number of  #4 ;return if #6 is  equal to  #5
['select', 'filter', 'filter', 'discard', 'aggregate', 'aggregate', 'boolean']