(S (S (S (BASENP (NNS Sources)) (VP (VBP suggest) (SBAR (IN that) (S (BASENP (NNP Google)) (VP (MD may) (VP (ADVP (RB firstly)) (VP (VP (VB introduce) (BASENP (PRPD its) (NN telephony) (NN service))) (PP (TO to) (NP (BASENP (NNS users)) (PP (IN in) (BASENP (DT the) (NNP United) (NNP Kingdom)))))))))))) (CONJP (COMMA ,) (CC but)) (S (NP (NP (BASENP (DT the) (JJ actual) (NN date)) (SBAR (WHADVP (WRB when)) (S (BASENP (DT the) (NN service)) (VP (MD will) (VP (VB launch)))))) (CC and) (NP (BASENP (DT the) (JJ exact) (NNS details)) (PP (IN of) (BASENP (DT the) (NN plan))))) (VP (VBP are) (ADJP (ADVP (IN as) (RB yet)) (JJ unknown))))) (PERIOD .))