Complex sentence: William Rees-Mogg, Baron Rees-Mogg (14 July 192829 December 2012) was an English journalist, editor of "The Times" (1967--81), chairman of the Arts Council of Great Britain, and vice-chairman of the BBC.
Split into simpler sentences: William Rees-Mogg, Baron Rees-Mogg (14 July 192829 December 2012) was an English journalist and public servant. He served as editor of "The Times" (1967--81), chairman of the Arts Council of Great Britain, and vice-chairman of the BBC.