Complex sentence: The 1952--53 DFB-Pokal was the 10th season of the competition formerly known as "Tschammer und Osten Pokal".
Split into simpler sentences: The 1952--53 DFB-Pokal was the 10th season of the competition. The DFB-Pokal was formerly known as "Tschammer und Osten Pokal", or "Tschammerpokal".