If there is at least one animal standing on its hind legs holding something in its front paws.
return animals ;return hind legs of #1 ;return #1 standing on #2 ;return front paws of #3 ;return #3 where  #4 are holding something ;return number of  #5 ;return if  #6 is at least one
['select', 'project', 'filter', 'project', 'comparative', 'aggregate', 'boolean']