Complex sentence: Helmut Bennemann (16 March 1915--17 November 2007) was a "Oberstleutnant" of Nazi Germany's Luftwaffe in World War II. Bennemann claimed 93 aerial victories in over 400 combat missions.
Split into simpler sentences: Helmut Bennemann (16 March 1915--17 November 2007) was a German "Oberstleutnant". During World War II Bennemann served in the German "Luftwaffe" claiming 93 aerial victories in over 400 combat missions.