the story does seem pretty unbelievable at times 
(ROOT (S (NP (DT the) (NN story)) (VP (VBZ does) (VP (VB seem) (S (ADJP (RB pretty) (JJ unbelievable))) (PP (IN at) (NP (NNS times)))))))
(ROOT (S (NP (DT ) (NN )) (VP (VBZ ) (VP (VB ) (S (ADJP (RB ) (JJ ))) (PP (IN ) (NP (NNS )))))))