Complex sentence: John Eleuthère du Pont (November 22,1938--December 9,2010) was an American philanthropist and heir to the Du Pont family fortune, he had been a published ornithologist, philatelist, philanthropist, conchologist, sports enthusiast, self-styled wrestling coach.
Split into simpler sentences: John Eleuthère du Pont (November 22,1938--December 9,2010) was an American philanthropist and heir to the Du Pont family fortune. He had been a published ornithologist, philatelist, philanthropist, conchologist, sports enthusiast, self-styled wrestling coach.