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