of an aging filmmaker still thumbing his nose at convention 
(ROOT (PP (IN of) (NP (NP (DT an) (VBG aging) (NN filmmaker)) (VP (ADVP (RB still)) (VBG thumbing) (NP (PRP$ his) (NN nose)) (PP (IN at) (NP (NN convention)))))))
(ROOT (PP (IN ) (NP (NP (DT ) (VBG ) (NN )) (VP (ADVP (RB )) (VBG ) (NP (PRP$ ) (NN )) (PP (IN ) (NP (NN )))))))