Complex sentence: Sir Rudolf Ernst Peierls, CBE (5 June 1907--19 September 1995) was a British physicist of German background who had a major role in Britain's nuclear programme, and also had a role in many modern sciences.
Split into simpler sentences: Sir Rudolf Ernst Peierls, CBE (5 June 1907--19 September 1995) was a German-born British physicist. Rudolf Peierls had a major role in Britain's nuclear programme, but he also had a role in many modern sciences.