(S (S (BASENP (JJ Last) (NN night)) (COMMA ,) (S (BASENP (DT the) (NNP California) (NNP Aqueduct)) (VP (VBD acted) (PP (IN as) (NP (BASENP (DT a) (NN barrier)) (PP (TO to) (BASENP (DT the) (NN fire)))))))) (PERIOD .))