Complex sentence: Coventry suffered severe bomb damage during the Second World War, most notoriously from a massive Luftwaffe air raid known as the "Coventry Blitz" on 14 November 1940.
Split into simpler sentences: Coventry suffered severe bomb damage during the Second World War. There was a massive Luftwaffe air raid, part of the "Coventry Blitz", on 14 November 1940.