Question: Who passed away first, Manfred von Richthofen or Cedric Popkin ?
Related documents: [0]  [DOC] Cedric Bassett Popkin (Born 20 June 1890, died 26 January 1968) is considered the person most likely to have killed German ace Manfred von Richthofen — also known as the "Red Baron" — on 21 April 1918. Popkin was an anti-aircraft (AA) machine gunner with the First Australian Imperial Force (AIF), during World War I. [END] 
[1]  [DOC] Manfred Albrecht Freiherr von Richthofen (2 May 1892 – 21 April 1918), also known as the "Red Baron", was a fighter pilot with the German Air Force during World War I. He is considered the ace-of-aces of the war, being officially credited with 80 air combat victories. [END] 
Answer: 
Manfred von Richthofen
Manfred von Richthofen