Complex sentence: The Birmingham Blitz was the heavy bombing by the Nazi German Luftwaffe of the city of Birmingham in the United Kingdom, beginning on 9 August 1940 and ending on 23 April 1943.
Split into simpler sentences: The Birmingham Blitz was the heavy bombing by the Nazi German Luftwaffe of the city of Birmingham in the United Kingdom. Beginning on 9 August 1940 and ending on 23 April 1943.