(S (S (PP (VBG According) (PP (TO to) (BASENP (DT the) (NNP BBC)))) (COMMA ,) (S (BASENP (NNP France)) (VP (VBZ has) (VP (VBN been) (NP (BASENP (DT the) (JJ major) (NN contributor)) (PP (IN in) (S (VP (VBG attempting) (S (VP (TO to) (VP (VP (VB bring) (BASENP (NNP Syria))) (ADVP (RB back) (PP (TO to) (BASENP (JJ diplomatic) (NNS talks))))))))))))))) (PERIOD .))