suffers from the addition of a wholly unnecessary pre-credit sequence designed to give some of the characters a ` back story 
(ROOT (VP (VBZ suffers) (PP (IN from) (NP (NP (DT the) (NN addition)) (PP (IN of) (NP (NP (DT a) (ADJP (RB wholly) (JJ unnecessary)) (JJ pre-credit) (NN sequence)) (VP (VBN designed) (S (VP (TO to) (VP (VB give) (NP (NP (DT some)) (PP (IN of) (NP (DT the) (NNS characters)))) (NP (DT a) (`` `) (NN back) (NN story))))))))))))
(ROOT (VP (VBZ ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (DT ) (ADJP (RB ) (JJ )) (JJ ) (NN )) (VP (VBN ) (S (VP (TO ) (VP (VB ) (NP (NP (DT )) (PP (IN ) (NP (DT ) (NNS )))) (NP (DT ) (`` ) (NN ) (NN ))))))))))))