there 's definite room for improvement . 
(ROOT (S (NP (EX there)) (VP (VBZ 's) (NP (NP (JJ definite) (NN room)) (PP (IN for) (NP (NN improvement))))) (. .)))
(ROOT (S (NP (EX )) (VP (VBZ ) (NP (NP (JJ ) (NN )) (PP (IN ) (NP (NN ))))) (. )))