the problem with movies about angels is they have a tendency to slip into hokum . 
(ROOT (S (NP (NP (DT the) (NN problem)) (PP (IN with) (NP (NP (NNS movies)) (PP (IN about) (NP (NNS angels)))))) (VP (VBZ is) (SBAR (S (NP (PRP they)) (VP (VBP have) (NP (DT a) (NN tendency) (S (VP (TO to) (VP (VB slip) (PP (IN into) (NP (NN hokum))))))))))) (. .)))
(ROOT (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (NNS )) (PP (IN ) (NP (NNS )))))) (VP (VBZ ) (SBAR (S (NP (PRP )) (VP (VBP ) (NP (DT ) (NN ) (S (VP (TO ) (VP (VB ) (PP (IN ) (NP (NN ))))))))))) (. )))