of four englishmen facing the prospect of their own mortality 
(ROOT (PP (IN of) (NP (NP (CD four) (NNS englishmen)) (VP (VBG facing) (NP (NP (DT the) (NN prospect)) (PP (IN of) (NP (PRP$ their) (JJ own) (NN mortality))))))))
(ROOT (PP (IN ) (NP (NP (CD ) (NNS )) (VP (VBG ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (PRP$ ) (JJ ) (NN ))))))))