... `` bowling for columbine '' remains a disquieting and thought-provoking film ... 
(ROOT (S (, ...) (`` ``) (S (VP (NN bowling) (PP (IN for) (NP (NN columbine))))) ('' '') (VP (VBZ remains) (NP (DT a) (ADJP (ADJP (JJ disquieting)) (CC and) (ADJP (NN thought) (HYPH -) (VBG provoking))) (NN film))) (. ...)))
(ROOT (S (, ) (`` ) (S (VP (NN ) (PP (IN ) (NP (NN ))))) ('' ) (VP (VBZ ) (NP (DT ) (ADJP (ADJP (JJ )) (CC ) (ADJP (NN ) (HYPH ) (VBG ))) (NN ))) (. )))