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