(S (S (NP (BASENP (NN Six) (NN energy) (NNS companies)) (PP (IN in) (BASENP (DT the) (NNP United) (NNP Kingdom)))) (VP (VBP have) (VP (VBN announced) (SBAR (IN that) (S (BASENP (PRP it)) (VP (VP (VBZ is) (ADJP (JJ likely))) (SBAR (IN that) (S (NP (BASENP (DT the) (NNS prices)) (PP (IN for) (BASENP (NN energy) (NNS bills)))) (VP (MD could) (VP (VB increase) (PP (IN over) (NP (BASENP (DT the) (NN course)) (PP (IN of) (BASENP (NN 2010))))))))))))))) (PERIOD .))