(S (S (BASENP (DT A) (NNP NATO) (NN statement)) (VP (VBD said) (SBAR (IN that) (S (S (NP (EX there)) (VP (VBD was) (NP (BASENP (DT no) (JJ obvious) (NN cause)) (PP (IN for) (BASENP (DT the) (NN accident)))))) (CC but) (S (BASENP (JJ hostile) (NN fire)) (VP (VBD had) (VP (VBN been) (VP (VBN ruled) (PRT (RP out)))))))))) (PERIOD .))