Complex sentence: In the final which was held on 28 April 1940 in the Olympic Stadium (Berlin) FC Nuremberg defeated Waldhof Mannheim 2--0, thereby becoming the first club to win the cup twice.
Split into simpler sentences: In the final which was held on 28 April 1940 in the Olympic Stadium (Berlin) 1. FC Nürnberg defeated Waldhof Mannheim 2--0, thereby becoming the first club to win the cup twice.