(S (S (BASENP (DT The) (NNP Sellafield) (JJ nuclear) (NN reprocessing) (NN plant)) (VP (VBD was) (VP (VP (VBN locked) (PRT (RP down))) (PP (IN for) (NP (BASENP (DT the) (JJ first) (NN time)) (PP (IN in) (BASENP (PRPD its) (NN history)))))))) (PERIOD .))