'm not exactly sure what this movie thinks it is about 
(ROOT (VP (VBP 'm) (RB not) (RB exactly) (JJ sure) (SBAR (WHNP (WP what)) (S (NP (DT this) (NN movie)) (VP (VBZ thinks) (SBAR (S (NP (PRP it)) (VP (VBZ is) (PP (IN about))))))))))
(ROOT (VP (VBP ) (RB ) (RB ) (JJ ) (SBAR (WHNP (WP )) (S (NP (DT ) (NN )) (VP (VBZ ) (SBAR (S (NP (PRP )) (VP (VBZ ) (PP (IN ))))))))))