Complex sentence: The club also takes part in the 2012--13 edition of the DFB-Pokal, the German Cup, where it reached the semi-final stage after defeating fellow Bundesliga side Mainz 05 1--2 after extra time on 26 February 2013.
Split into simpler sentences: The club also takes part in the 2012--13 edition of the DFB-Pokal, the German Cup, where it reached the semi-final stage after defeating fellow Bundesliga side 1. FSV Mainz 05 by a score of 1--2 after extra time on 26 February 2013.