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