Complex sentence: The following day, Voss downed two British aircraft in ten minutes; the first one burned; the second aircrew downed protested they had been strafed by Voss after crashlanding within German lines.
Split into simpler sentences: The following day, Voss downed two British aircraft in ten minutes. The first one burned; the second aircrew downed protested they had been strafed by Voss after crashlanding within German lines.