Complex sentence: Witzleben, who was to become Commander-in-Chief of the Wehrmacht if the attempt had succeeded, was arrested and sentenced to death; the execution was carried out on 8 August 1944.
Split into simpler sentences: Witzleben, who was to become Commander-in-Chief of the Wehrmacht if the attempt had succeeded, was arrested and sentenced to death. The execution was carried out on 8 August 1944.