the only fun part of the movie is playing the obvious game . 
(ROOT (S (NP (NP (DT the) (JJ only) (JJ fun) (NN part)) (PP (IN of) (NP (DT the) (NN movie)))) (VP (VBZ is) (S (VP (VBG playing) (NP (DT the) (JJ obvious) (NN game))))) (. .)))
(ROOT (S (NP (NP (DT ) (JJ ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN )))) (VP (VBZ ) (S (VP (VBG ) (NP (DT ) (JJ ) (NN ))))) (. )))