the attempt to complicate the story only defies credibility 
(ROOT (S (NP (DT the) (NN attempt) (S (VP (TO to) (VP (VB complicate) (NP (DT the) (NN story)))))) (ADVP (RB only)) (VP (VBZ defies) (NP (NN credibility)))))
(ROOT (S (NP (DT ) (NN ) (S (VP (TO ) (VP (VB ) (NP (DT ) (NN )))))) (ADVP (RB )) (VP (VBZ ) (NP (NN )))))