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