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