If there is at least one white puppy sitting on the ground looking forward.
return puppy ;return #1 that is white ;return ground ;return #2 sitting on #3 ;return #4 that is looking forward ;return the  number of  #5 ;return if  #6 is at least one
['select', 'filter', 'select', 'filter', 'filter', 'aggregate', 'boolean']