if a horror movie 's primary goal is to frighten and disturb , then they works spectacularly well ... a shiver-inducing , nerve-rattling ride . 
(ROOT (S (SBAR (IN if) (S (NP (NP (DT a) (NN horror) (NN movie) (POS 's)) (JJ primary) (NN goal)) (VP (VBZ is) (S (VP (TO to) (VP (VB frighten) (CC and) (VB disturb))))))) (, ,) (ADVP (RB then)) (NP (PRP they)) (VP (VBZ works) (ADVP (RB spectacularly) (RB well)) (, ...) (NP (DT a) (ADJP (NN shiver) (HYPH -) (VBG inducing)) (, ,) (ADJP (NN nerve) (HYPH -) (NN rattling)) (NN ride))) (. .)))
(ROOT (S (SBAR (IN ) (S (NP (NP (DT ) (NN ) (NN ) (POS )) (JJ ) (NN )) (VP (VBZ ) (S (VP (TO ) (VP (VB ) (CC ) (VB ))))))) (, ) (ADVP (RB )) (NP (PRP )) (VP (VBZ ) (ADVP (RB ) (RB )) (, ) (NP (DT ) (ADJP (NN ) (HYPH ) (VBG )) (, ) (ADJP (NN ) (HYPH ) (NN )) (NN ))) (. )))