the humans are acting like puppets 
(ROOT (S (NP (DT the) (NNS humans)) (VP (VBP are) (VP (VBG acting) (PP (IN like) (NP (NNS puppets)))))))
(ROOT (S (NP (DT ) (NNS )) (VP (VBP ) (VP (VBG ) (PP (IN ) (NP (NNS )))))))