of the rollicking dark humor so necessary 
(ROOT (PP (IN of) (NP (NP (DT the) (VBG rollicking) (JJ dark) (NN humor)) (ADJP (RB so) (JJ necessary)))))
(ROOT (PP (IN ) (NP (NP (DT ) (VBG ) (JJ ) (NN )) (ADJP (RB ) (JJ )))))