the second half of the movie really goes downhill . 
(ROOT (S (NP (NP (DT the) (JJ second) (NN half)) (PP (IN of) (NP (DT the) (NN movie)))) (ADVP (RB really)) (VP (VBZ goes) (ADVP (RB downhill))) (. .)))
(ROOT (S (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN )))) (ADVP (RB )) (VP (VBZ ) (ADVP (RB ))) (. )))