_:b666497182 "--(0[1-9]|1[0-9]|20)(Z|(\\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))?" . _:b666497181 _:b666497182 . _:b666497181 . _:b666497181 . _:b666497182 .