a severe case of oversimplification , superficiality and silliness 
(ROOT (NP (NP (DT a) (JJ severe) (NN case)) (PP (IN of) (NP (NN oversimplification) (, ,) (NN superficiality) (CC and) (NN silliness)))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NN ) (, ) (NN ) (CC ) (NN )))))