what position did Ömer Toprak play for Borussia Dortmund
centre back
Title: Borussia Dortmund
Passage: 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.
Title: 1997 UEFA Super Cup
Passage: The 1997 UEFA Super Cup was a two-legged football match played on 8 January 1998 and 11 March 1998 between Borussia Dortmund of Germany, winner of the 1996–97 UEFA Champions League and Barcelona of Spain, winner of the 1996–97 UEFA Cup Winners' Cup.  Barcelona won the match 3–1 on aggregate, beating Borussia Dortmund 2–0 at Camp Nou in the first leg and drawing the second leg 1–1 in Westfalenstadion, Dortmund.
Title: Ömer Toprak
Passage: Ömer Toprak (born 21 July 1989) is a Turkish professional footballer who plays as a centre back for German club Borussia Dortmund and the Turkey national team.
Ömer Toprak Borussia Dortmund