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