Question: What state of Germany was the 2012–13 DFB-Pokal defending champions from?

full_context: Document 1: 2010 DFB-Pokal Final: The 2009–10 DFB-Pokal season came to a close on 15 May 2010 when Bayern Munich played defending champions Werder Bremen at the Olympiastadion in Berlin. Bayern thrashed Bremen 4-0 with goals from Robben, Olić, Ribéry, and Schweinsteiger. The title capped off a successful season, with Bayern winning the domestic double of the Fußball-Bundesliga and the DFB-Pokal. These successes were Bayern's 22nd league and 15th cup titles. Bayern were also in line for "The Treble" but lost to Internazionale of Milan, 2-0 in the Champions League Final at Madrid's Santiago Bernabéu Stadium on 22 May.
Document 2: 2012–13 DFB-Pokal: The 2012–13 DFB-Pokal was the 70th season of the annual German football cup competition. It began on 17 August 2012 with the first of six rounds and ended on 1 June 2013 with the final at the Olympic Stadium in Berlin. The defending champions were Borussia Dortmund, but they were beaten by Bayern Munich in the quarter-finals. Bayern Munich went on to win the competition, defeating VfB Stuttgart 3–2 in the final. As runners-up, VfB Stuttgart have qualified for the third qualifying round of the 2013–14 UEFA Europa League, since Bayern Munich won the Bundesliga and will be competing in the 2013–14 UEFA Champions League.
Document 3: FC Schalke 04: Fußballclub Gelsenkirchen-Schalke 04 e. V., commonly known as FC Schalke 04 (] ), Schalke or abbreviated as S04 (] ), is a professional German association-football club and multi-sports club originally from the district of Gelsenkirchen, North Rhine-Westphalia. The "04" in the club's name derives from its formation in 1904. Schalke has long been one of the most popular professional football teams and multi-sports club in Germany, even though major successes have been rare since the club's heyday in the 1930s and early 1940s. Schalke play in the Bundesliga, the top tier of the German football league system. As of December 2015, the club has 140,000 members, making it the second-largest sports club in Germany and the sixth-largest sports club in the world in terms of membership. Other activities offered by the club include athletics (track and field), basketball, handball, table tennis, winter sports and eSports.
Document 4: 2015–16 DFB-Pokal: The 2015–16 DFB-Pokal was the 73rd season of the annual German football cup competition. Sixty-four teams participated in the competition, including all teams from the previous year's Bundesliga and the 2. Bundesliga. It began on 7 August 2015 with the first of six rounds and ended on 21 May 2016 with the final at the Olympiastadion in Berlin, a nominally neutral venue, which has hosted the final since 1985. The DFB-Pokal is considered the second-most important club title in German football after the Bundesliga championship. The DFB-Pokal is run by the German Football Association (DFB).
Document 5: Bayer 04 Leverkusen: Bayer 04 Leverkusen Fußball GmbH, also known as Bayer 04 Leverkusen ] , Bayer Leverkusen, Leverkusen or simply Bayer, is a German football club based in Leverkusen, North Rhine-Westphalia. The club plays in the Bundesliga, the top tier of the German football league system, and hosts matches at the BayArena.
Document 6: 2016 DFB-Pokal Final: The 2016 DFB-Pokal Final decided the winner of the 2015–16 DFB-Pokal, the 73rd season of Germany's premier knockout football cup competition. It was played on 21 May 2016 at the Olympiastadion in Berlin.
Document 7: Borussia Dortmund: Ballspielverein Borussia 09 e.V. Dortmund, commonly known as Borussia Dortmund ] , BVB, or simply Dortmund, is a German sports club based in Dortmund, North Rhine-Westphalia ("Borussia" is the Latin equivalent of Prussia). The football team is part of a large membership-based sports club with more than 145,000 members, making BVB the second largest sports club by membership in Germany. Dortmund plays in the Bundesliga, the top tier of the German football league system. Dortmund is one of the most successful clubs in German football history.
Document 8: 2008 DFB-Pokal Final: The 2008 DFB-Pokal Final decided the winner of the 2007–08 DFB-Pokal, the 65th season of Germany's premier knockout football cup competition. The match took place on 19 April 19, 2008 between thirteen-time winners Bayern München and two-time winners Borussia Dortmund. The final was played in front of 70,000 at Berlin's Olympiastadion. Bayern ran out 2–1 winners in extra time, thanks to two strikes from Italian forward Luca Toni, gaining their 14th DFB-Pokal title and gaining the first trophy of a league and cup double.
Document 9: German Football Association: The German Football Association (German: "Deutscher Fußball-Bund" ] ; DFB ] ) is the governing body of football in Germany. A founding member of both FIFA and UEFA, the DFB has jurisdiction for the German football league system and is in charge of the men's and women's national teams. The DFB headquarters are in Frankfurt am Main. Sole members of the DFB are the German Football League (German: "Deutsche Fußball Liga" ; DFL), organising the professional Bundesliga and the 2. Bundesliga, along with five regional and 21 state associations, organising the semi-professional and amateur levels. The 21 state associations of the DFB have a combined number of more than 25,000 clubs with more than 6.8 million members, making the DFB the single largest sports federation in the world.
Document 10: 2013 DFB-Pokal Final: The 2012–13 DFB-Pokal tournament came to a close on 1 June 2013 when Bayern Munich played VfB Stuttgart at the Olympiastadion in Berlin.
Document 11: SV Werder Bremen: Sportverein Werder Bremen von 1899 e. V. (] ), commonly known as Werder Bremen, is a German sports club located in Bremen in the northwest German federal state Free Hanseatic City of Bremen. The club was founded in 1899 and has grown to 40,400 members. It is best known for its association football team.
Document 12: 2009–10 DFB-Pokal: The 2009–10 DFB-Pokal was the 67th season of the annual German football cup competition. It commenced on the weekend around 1 August 2009 with the matches of Round 1 and ended on 15 May 2010 with the final which is traditionally held at Olympic Stadium in Berlin. Since the cup winner, Bayern Munich, also won the German championship and the runner-up, Werder Bremen, qualified for the Champions League, VfB Stuttgart, the sixth-placed team of the championship, qualified for the 2010–11 UEFA Europa League third qualifying round instead.
Document 13: FC Bayern Munich: Fußball-Club Bayern München e.V., commonly known as FC Bayern München (] ), FCB, Bayern Munich, or FC Bayern, is a German sports club based in Munich, Bavaria (Bayern), Germany. It is best known for its professional football team, which plays in the Bundesliga, the top tier of the German football league system, and is the most successful club in German football history, having won a record 27 national titles and 18 national cups.
Document 14: Dortmund: Dortmund (] ; Low German: "Düörpm" [ˈdyːœɐ̯pm̩] ; Latin: "Tremonia" ) is an independent city in North Rhine-Westphalia, Germany. It is in the middle part of the state and is considered to be the administrative, commercial and cultural centre of the eastern Ruhr area. Its population of 581,612 (2015) makes it the 8th largest city in Germany. Moreover, Dortmund is the largest city by area and population in the Ruhr Area, an urban area with some 5.1 million (2011) inhabitants which is the largest urban agglomeration in Germany.
Document 15: 2013 DFL-Supercup: The 2013 DFL-Supercup was the fourth DFL-Supercup, an annual football match contested by the winners of the previous season's Bundesliga and DFB-Pokal competitions. It featured Bayern Munich, winners of the 2012–13 Bundesliga and the 2012-13 DFB-Pokal and, as a result of the former winning both competitions, the Bundesliga runners-up Borussia Dortmund at Signal Iduna Park.
ground_truth: North Rhine-Westphalia