(S (S (BASENP (PRP It)) (VP (VBD said) (SBAR (S (BASENP (EX there)) (VP (VBD was) (NP (BASENP (JJ significant) (NNS doubts)) (SBAR (S (VP (TO to) (VP (VB be) (VP (VBN raised) (PP (IN over) (NP (BASENP (JJ several) (JJ key) (NNS pieces)) (PP (IN of) (NP (BASENP (NN evidence)) (PP (IN in) (BASENP (DT the) (JJ original) (NN trial)))))))))))))))))) (PERIOD .))