[ num ] sp capword , sp capword othword . sp capword othword sp othword sp othword sp othword sp othword sp othword sp upword sp smallet sp smallet othword sp num . sp ( capword othword sp othword sp othword sp othword sp othword sp othword - num sp upword sp othword ) sp [ capword ] sp : sp capword . sp caplet . sp othword sp / sp capword othword sp capword othword sp ; sp capword sp othword sp othword sp capword , sp capword . sp — sp [ caplet . sp smallet . sp : sp smallet . sp smallet . ] , sp year . sp — sp upword : sp sp othword : / / othword . othword - othword . othword / othword - year .