If a dog is in front of furniture on a wood floor
return dog ;return furniture ;return floor ;return #3 that is wood ;return #2 that is on #4 ;return #1 that is in  front of #5 ;return number of  #6 ;return if  #7 is at least one
['select', 'select', 'select', 'filter', 'filter', 'filter', 'aggregate', 'boolean']