of great actors hamming it up 
(ROOT (PP (IN of) (NP (NP (JJ great) (NNS actors)) (VP (VBG hamming) (NP (PRP it)) (PRT (RP up))))))
(ROOT (PP (IN ) (NP (NP (JJ ) (NNS )) (VP (VBG ) (NP (PRP )) (PRT (RP ))))))