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