, this halloween is a gory slash-fest . 
(ROOT (S (, ,) (NP (DT this) (NN halloween)) (VP (VBZ is) (NP (DT a) (JJ gory) (NN slash) (HYPH -) (NN fest))) (. .)))
(ROOT (S (, ) (NP (DT ) (NN )) (VP (VBZ ) (NP (DT ) (JJ ) (NN ) (HYPH ) (NN ))) (. )))