his innocence soon becomes a questionable kind of inexcusable dumb innocence 
(ROOT (S (NP (PRP$ his) (NN innocence)) (ADVP (RB soon)) (VP (VBZ becomes) (NP (NP (DT a) (JJ questionable) (NN kind)) (PP (IN of) (NP (JJ inexcusable) (JJ dumb) (NN innocence)))))))
(ROOT (S (NP (PRP$ ) (NN )) (ADVP (RB )) (VP (VBZ ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (JJ ) (JJ ) (NN )))))))