(S (S (S (BASENP (DT A) (NN driving) (NN ban)) (VP (VBZ remains) (PP (IN in) (BASENP (NN effect))))) (SBAR (IN while) (S (NP (BASENP (DT a) (NN state)) (PP (IN of) (BASENP (NN emergency)))) (VP (VBZ exists))))) (PERIOD .))