a sharp , amusing study of the cult 
(ROOT (NP (NP (DT a) (JJ sharp) (, ,) (JJ amusing) (NN study)) (PP (IN of) (NP (DT the) (NN cult)))))
(ROOT (NP (NP (DT ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (NN )))))