how a skillful filmmaker can impart a message without bludgeoning the audience over the head 
(ROOT (SBAR (WHADVP (WRB how)) (S (NP (DT a) (JJ skillful) (NN filmmaker)) (VP (MD can) (VP (VB impart) (NP (DT a) (NN message)) (PP (IN without) (S (VP (VBG bludgeoning) (NP (DT the) (NN audience)) (PP (IN over) (NP (DT the) (NN head)))))))))))
(ROOT (SBAR (WHADVP (WRB )) (S (NP (DT ) (JJ ) (NN )) (VP (MD ) (VP (VB ) (NP (DT ) (NN )) (PP (IN ) (S (VP (VBG ) (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN )))))))))))