(S (S (BASENP (NNP Wikinews)) (VP (VP (VBD contacted) (NP (BASENP (NNP McCain) (POS 's)) (NN campaign))) (CONJP (COMMA ,) (CC but)) (VP (VBZ has) (VP (ADVP (RB yet)) (S (VP (TO to) (VP (VB receive) (BASENP (DT a) (NN response))))))))) (PERIOD .))