the problem with movies about angels 
(ROOT (NP (NP (DT the) (NN problem)) (PP (IN with) (NP (NP (NNS movies)) (PP (IN about) (NP (NNS angels)))))))
(ROOT (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (NNS )) (PP (IN ) (NP (NNS )))))))