the movie 's downfall is to substitute plot for personality . 
(ROOT (S (NP (NP (DT the) (NN movie) (POS 's)) (NN downfall)) (VP (VBZ is) (S (VP (TO to) (VP (VB substitute) (NP (NN plot)) (PP (IN for) (NP (NN personality))))))) (. .)))
(ROOT (S (NP (NP (DT ) (NN ) (POS )) (NN )) (VP (VBZ ) (S (VP (TO ) (VP (VB ) (NP (NN )) (PP (IN ) (NP (NN ))))))) (. )))