(S (S (BASENP (NNP Medvedev)) (VP (VP (VBD announced) (PP (IN during) (NP (BASENP (DT a) (NN meeting)) (PP (IN of) (BASENP (DT the) (NNP Russian) (NNP Security) (NNP Council)))))) (SBAR (IN that) (S (BASENP (PRP he)) (VP (VBD had) (VP (VBN signed) (BASENP (DT the) (NN document)))))))) (PERIOD .))