the director 's experiment is a successful one . 
(ROOT (S (NP (NP (DT the) (NN director) (POS 's)) (NN experiment)) (VP (VBZ is) (NP (DT a) (JJ successful) (NN one))) (. .)))
(ROOT (S (NP (NP (DT ) (NN ) (POS )) (NN )) (VP (VBZ ) (NP (DT ) (JJ ) (NN ))) (. )))