(S (S (PP (IN At) (BASENP (DT a) (JJ separate) (NN news-conference))) (COMMA ,) (S (BASENP (NNP US) (JJ military) (NN spokesperson) (NNP Major) (NNP General) (NNP William) (NNP Caldwell)) (VP (VBD said) (SBAR (S (BASENP (DT the) (NN security) (NN plan)) (VP (VBZ is) (PP (IN showing) (NP (BASENP (NNS signs)) (PP (IN of) (BASENP (NN progress))))))))))) (PERIOD .))