an oily arms dealer , squad car pile-ups and the requisite screaming captain 
(ROOT (NP (NP (DT an) (JJ oily) (NNS arms) (NN dealer)) (, ,) (NP (NML (NN squad) (NN car)) (NN pile) (HYPH -) (NNS ups)) (CC and) (NP (DT the) (JJ requisite) (VBG screaming) (NN captain))))
(ROOT (NP (NP (DT ) (JJ ) (NNS ) (NN )) (, ) (NP (NML (NN ) (NN )) (NN ) (HYPH ) (NNS )) (CC ) (NP (DT ) (JJ ) (VBG ) (NN ))))