If an image contains various parrots perched on a humans arms and shoulders.
return parrots ;return humans ;return arms of  #2 ;return shoulders of  #2 ;return #3 or #4 ;return #1 that are  perched on #5 ;return If #6 is  in  an image
['select', 'select', 'project', 'project', 'union', 'filter', 'boolean']