Complex sentence: After the German invasion of 1940, he was arrested in Paris by the Gestapo and taken to Germany, where on 9 February 1945 he was killed in Buchenwald concentration camp.
Split into simpler sentences: After the German invasion of France in 1940, he was arrested in Paris by the Gestapo. Mayr taken to Germany, where on 9 February 1945 he was killed in Buchenwald concentration camp.