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