the overall result is an intelligent , realistic portrayal of testing boundaries . 
(ROOT (S (NP (DT the) (JJ overall) (NN result)) (VP (VBZ is) (NP (NP (DT an) (JJ intelligent) (, ,) (JJ realistic) (NN portrayal)) (PP (IN of) (NP (NN testing) (NNS boundaries))))) (. .)))
(ROOT (S (NP (DT ) (JJ ) (NN )) (VP (VBZ ) (NP (NP (DT ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (NN ) (NNS ))))) (. )))