by weaving a theme throughout this funny film 
(ROOT (PP (IN by) (S (VP (VBG weaving) (NP (DT a) (NN theme)) (PP (IN throughout) (NP (DT this) (JJ funny) (NN film)))))))
(ROOT (PP (IN ) (S (VP (VBG ) (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN )))))))