(S (S (S (BASENP (NNP Russia)) (VP (VBZ has) (VP (ADVP (RB so) (RB far)) (VP (RB not) (VP (VBN confirmed) (NP (BASENP (DT the) (NNS identities)) (PP (IN of) (NP (BASENP (JJ other) (NNS prisoners)) (SBAR (S (VP (TO to) (VP (VB be) (VP (VBN released)))))))))))))) (COMMA ,) (SBAR (IN although) (S (BASENP (JJ several) (NNS names)) (VP (VBP have) (VP (VBN been) (VP (VBG speculated) (NP (PRN (COMMA ,) (PP (VBG including) (NP (NP (BASENP (NNP Alexander) (NNP Zaporozhsky)) (COMMA ,) (BASENP (NNP Sergei) (NNP Skripal))) (CONJP (COMMA ,) (CC and)) (BASENP (NNP Alexander) (NNP Sypachev)))) (COMMA ,)) (NP (BASENP (DT all)) (VP (VBN accused) (PP (IN of) (S (VP (VP (VBG transferring) (BASENP (NN information))) (PP (TO to) (BASENP (JJ foreign) (NNS governments))))))))))))))) (PERIOD .))