If there are two empty wooden curio cabinets with glass fronts.
return curio cabinets ;return #1 that are  empty ;return #2 that are  wooden ;return front of  #3 ;return #3 where #4 is  glass ;return number of #5 ;return if  #6 is  equal to two
['select', 'filter', 'filter', 'project', 'comparative', 'aggregate', 'boolean']