(S (S (ADVP (RB However)) (COMMA ,) (S (BASENP (NNP Russia)) (VP (VBZ has) (VP (VP (VBN put) (BASENP (NNP Hamas))) (PP (IN under) (NP (BASENP (NN pressure)) (S (VP (TO to) (VP (VP (VB recognize) (BASENP (NNP Israel))) (CC and) (VP (VB renounce) (BASENP (NN violence)))))))))))) (PERIOD .))