[ capword , sp year ] sp capword , sp caplet . sp ( year ) . sp capword sp othword sp othword sp othword sp othword - othword sp othword othword . sp upword sp num : sp capword sp othword sp othword sp othword sp othword sp othword sp othword sp capword sp othword othword sp othword sp othword , sp num – num . sp othword : / / othword . othword / othword : num . num / num . num