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