(S (S (BASENP (DT This)) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (BASENP (NNS residents)) (VP (MD can) (VP (VP (VB petition) (BASENP (NNP Parliament))) (S (VP (TO to) (VP (VB change) (NP (BASENP (DT the) (NN way)) (SBAR (S (BASENP (DT the) (NN line)) (VP (VBZ is) (VP (VBN constructed))))))))))))))) (PERIOD .))