(S (S (BASENP (DT The) (JJ national) (NN grid)) (VP (VBZ has) (VP (VBN said) (SBAR (IN that) (S (BASENP (PRP it)) (VP (VBZ has) (VP (VBN sustained) (NP (BASENP (DT no) (NN damage)) (PP (TO to) (BASENP (DT the) (NN electricity) (NN network))))))))))) (PERIOD .))