(S (BASENP (NNP British) (NNP Gas)) (VP (VBD stated) (COLON :) (QT (DQL ``) (QTC (S (S (BASENP (NNS Prices)) (VP (PRN (LRB [) (VBP are) (RRB ])) (ADJP (JJ likely) (S (VP (TO to) (VP (VB remain) (PP (IN at) (BASENP (ADJP (RB historically) (JJ high)) (NNS levels))))))))) (CONJP (COMMA ,) (CC and)) (S (S (PP (IN in) (BASENP (NN fact))) (VP (ADJP (JJ likely) (S (VP (TO to) (VP (VB increase))))))) (SBAR (IN as) (S (BASENP (JJ non-commodity) (NNS costs)) (VP (VP (VBP rise) (ADVP (RB ever))) (ADVP (RB upwards))))))) (PERIOD .)) (DQR ''))))