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