not the craven of ' a nightmare 
(ROOT (NP (RB not) (NP (NP (DT the) (NN craven)) (PP (IN of) (`` ') (NP (DT a) (NN nightmare))))))
(ROOT (NP (RB ) (NP (NP (DT ) (NN )) (PP (IN ) (`` ) (NP (DT ) (NN ))))))