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