'm guessing the director is a magician . 
(ROOT (S (VP (VBP 'm) (VP (VBG guessing) (SBAR (S (NP (DT the) (NN director)) (VP (VBZ is) (NP (DT a) (NN magician))))))) (. .)))
(ROOT (S (VP (VBP ) (VP (VBG ) (SBAR (S (NP (DT ) (NN )) (VP (VBZ ) (NP (DT ) (NN ))))))) (. )))