(S (S (NP (BASENP (JJ British) (NNPS MPs)) (PP (IN on) (BASENP (DT the) (NNPS Commons) (NNP Environmental) (NNP Audit) (NNP Committee)))) (VP (VBP warn) (SBAR (S (S (BASENP (NNP Britain)) (VP (MD could) (VP (VB face) (BASENP (JJ widespread) (JJ electrical) (NNS blackouts))))) (SBAR (IN if) (S (BASENP (JJ new) (JJ generating) (NN capacity)) (VP (VP (VBZ is) (RB not)) (VP (VBN added) (ADVP (RB soon)))))))))) (PERIOD .))