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