succeeds mainly on the shoulders of its actors . 
(ROOT (S (VP (VBZ succeeds) (PP (ADVP (RB mainly)) (IN on) (NP (NP (DT the) (NNS shoulders)) (PP (IN of) (NP (PRP$ its) (NNS actors)))))) (. .)))
(ROOT (S (VP (VBZ ) (PP (ADVP (RB )) (IN ) (NP (NP (DT ) (NNS )) (PP (IN ) (NP (PRP$ ) (NNS )))))) (. )))