Complex sentence: David W. Burke (June 7,1935--April 19,2014) was an American politician and CBS News president (1988-90), and later an executive at ABC News, where he worked with Peter Jennings and Barbara Walters, among others.
Split into simpler sentences: David W. Burke (June 7,1935--April 19,2014) was an American news executive. He was President of CBS News (1988-90), and later an executive at ABC News, where he worked with Peter Jennings and Barbara Walters, among others.