If at least one image shows a person touching a parrot that is on its back.
return person ;return parrot ;return #2 that is on its back ;return #1 that is touching #3 ;return images of #4 ;return the  number of  #5 ;return if  #6 is at least one
['select', 'select', 'filter', 'filter', 'project', 'aggregate', 'boolean']