it 's not a great monster movie . 
(ROOT (S (NP (PRP it)) (VP (VBZ 's) (RB not) (NP (DT a) (JJ great) (NN monster) (NN movie))) (. .)))
(ROOT (S (NP (PRP )) (VP (VBZ ) (RB ) (NP (DT ) (JJ ) (NN ) (NN ))) (. )))