there 's nothing exactly wrong here , but 
(ROOT (S (NP (EX there)) (VP (VP (VBZ 's) (NP (NP (NN nothing)) (ADJP (RB exactly) (JJ wrong))) (ADVP (RB here))) (, ,) (CC but))))
(ROOT (S (NP (EX )) (VP (VP (VBZ ) (NP (NP (NN )) (ADJP (RB ) (JJ ))) (ADVP (RB ))) (, ) (CC ))))