If one dog is sleeping directly on a hard, wood-look floor.
return dogs ;return floor ;return #2 that is  hard ;return #3 that is  wood-look ;return #1 sleeping directly on #4 ;return number of #5 ;return if  #6 is  equal to one
['select', 'select', 'filter', 'filter', 'filter', 'aggregate', 'boolean']