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