[ num ] sp capword sp upword . sp caplet sp othword sp othword sp othword - othword sp othword sp othword sp [ capword sp capword ] . sp capword , capword : sp capword . sp othword sp capword sp capword , sp capword sp capword sp capword sp capword ; sp year . sp capword sp othword : othword : / / othword . othword . othword . othword . othword / othword / num / num .