(S (S (BASENP (NNS Workers)) (VP (VBP have) (VP (VP (VBN walked) (PRT (RP out))) (PP (PP (PP (PP (IN at) (NP (BASENP (DT a) (NN power) (NN station)) (PP (IN in) (NP (BASENP (NNP Aberthaw)) (PP (IN in) (BASENP (JJ south) (NNP Wales))))))) (CC and) (PP (IN at) (NP (BASENP (NNS plants)) (PP (IN at) (NP (NP (BASENP (NNP Fidler) (POS 's)) (NNP Ferry)) (PP (IN in) (BASENP (NNP Cheshire)))))))) (COMMA ,) (PP (IN at) (NP (BASENP (NNP Lackenby)) (PP (IN in) (BASENP (NNP Teesside)))))) (CC and) (PP (IN at) (NP (BASENP (DT the) (NN gas) (NNS terminals)) (PP (IN near) (NP (NP (BASENP (NNP Peterhead)) (PP (IN in) (BASENP (NNP Scotland)))) (CC and) (NP (BASENP (NNP Milford) (NNP Haven)) (PP (IN in) (BASENP (NNP Wales)))))))))))) (PERIOD .))