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