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