Question: Thomas Ritter  is a retired German footballer who played one game for Germany in 1993 against Uruguay, as a substitute for Stefan Effenberg, a retired German footballer who last managed what club?

full_context: Document 1: Thomas Schneider (footballer): Thomas Schneider (born 24 November 1972) is a German professional football manager and former defender, who is currently assistant manager to Joachim Löw for the German national team. Schneider had previously been manager of German Bundesliga club VfB Stuttgart.
Document 2: Stefan Müller (footballer, born 1974): Stefan Müller (born 8 March 1974 in Schopfheim) is a retired German footballer. He spent his entire career with SC Freiburg, joining the club in 1993, and making his debut the following season as the club went on to finish third in the Bundesliga. He played a further ten seasons for the club, eight of which were at the highest level – Freiburg were relegated in 1997 and 2002, but bounced back immediately on both occasions. In total he made 203 league appearances for the club, scoring 12 times before retiring in 2005. He won five caps for German under-21 team in the mid-1990s.
Document 3: Michael Ballack: Michael Ballack (] ; born 26 September 1976) is a retired German footballer. He is among the top goal scorers in the history of the German national team. Ballack wore the number 13 shirt for every team he has played for, save for 1. FC Kaiserslautern. He was selected by Pelé as one of FIFA's 125 Greatest Living Players, and as the UEFA Club Midfielder of the Year in 2002. He won the German Footballer of the Year award three times – in 2002, 2003 and 2005. Ballack was known for his passing range, powerful shot, physical strength and commanding presence in midfield.
Document 4: Per Mertesacker: Per Mertesacker (] ; born 29 September 1984) is a German professional footballer who plays as a centre back for Premier League club Arsenal. He also played for the Germany national team but retired in August 2014 after winning the World Cup. Mertesacker is a youth product of Hannover 96 and he made his senior league debut in November 2003. He was soon dubbed "the Defence Pole" (""die Abwehrlatte"") by German tabloids and gained a reputation for his good disciplinary record, going 31 Bundesliga games without being booked. Since joining Arsenal, their fans have nicknamed him "the BFG", which is short for "Big Fucking German" and an allusion to Roald Dahl's "The BFG" due to his height. He has been described as an imposing, reliable, dominant and an accomplished defender.
Document 5: Holger Badstuber: Holger Felix Badstuber (] ; born 13 March 1989) is a German footballer who plays as a centre back for VfB Stuttgart and the German national team. He is primarily a centre back, although he is a capable left back. He made his debut in the 2009–10 season in the Bundesliga, at the age of 19, playing nearly every game that year and helped the club win the league and cup double and reached the Champions League final that same year, before eventually earning a call up to the World Cup in 2010. Former Bayern Munich coach Louis van Gaal stated that he is the best left footed defender in Germany.
Document 6: Thomas Emmrich: Thomas Emmrich (born 21 July 1953) is a former tennis player for East Germany. Between 1970 and 1988, Emmrich won 47 German Democratic Republic (GDR) titles (16 singles and 31 in the doubles and mixed). Unfortunately, he entered the tennis scene after the GDR had decided to promote only those sports which were relevant for the Olympics’ medals table. Thus, he was barred from international competitions outside the Eastern bloc countries and had to keep the status as an amateur. However, he gained some points at an ATP tournament in Sofia as GDR functionaries had not noticed that it had become part of the ATP tour. After this tournament, the ATP ranked him number 482—the only entry of a GDR tennis player in the ATP rankings.
Document 7: Pierre Littbarski: Pierre Michael Littbarski (] ; born 16 April 1960) is a German football manager and former footballer. He was mainly used as an attacking midfielder or winger and was best known for his brilliant dribbling abilities. Littbarski was a FIFA World Cup winner with West Germany in 1990. He was also runner–up twice in 1982 and 1986 with West Germany. Littbarski was caretaker manager of VfL Wolfsburg after taking over from Steve McClaren from 7 February to 17 March 2011.
Document 8: Thomas Müller: Thomas Müller (] ; born 13 September 1989) is a German professional footballer who plays for and vice-captains Bayern Munich and the German national team. A versatile player, Müller plays as a midfielder or forward, and has been deployed in a variety of attacking roles – as an attacking midfielder, second striker, centre forward and on either wing. He has been praised for his positioning, teamwork and stamina, work-rate, and has shown consistency in both scoring and creating goals.
Document 9: Thomas Reiter: Thomas Arthur Reiter (born 23 May 1958 in Frankfurt, West Germany) is a retired European astronaut and is a Brigadier General in the German Air Force currently working as ESA Interagency Coordinator and Advisor to the Director General at the European Space Agency (ESA). He was one of the top 25 astronauts in terms of total time in space. With his wife and two sons he lives near Oldenburg in Lower Saxony.
Document 10: Ronny Teuber: Ronny Teuber (born 1 September 1965) is a German former footballer and former member of the East Germany national football team as well as the East Germany national under-21 football team. He currently works as a goalkeeping coach for Bundesliga side Hamburger SV.
Document 11: List of Dynamo Dresden players: As one of the leading clubs in East Germany, Dynamo Dresden provided 36 East German internationals, including the country's second most-capped player, Hans-Jürgen Dörner, and its joint second top scorer, Hans-Jürgen Kreische. Kreische and Siegmar Wätzlich were in East Germany's squad for their only World Cup appearance (1974), while twelve Dynamo players won Olympic medals, including six gold medallists in 1976. After German reunification a number of Dynamo players went on to represent the Germany national team, including Jens Jeremies, Ulf Kirsten, Olaf Marschall and Alexander Zickler. Dynamo have also seen internationals from other nations, including Australia (Joshua Kennedy and Mark Schwarzer), the Czech Republic (Ivo Ulich and Tomas Votava), Slovenia (Klemen Lavrič and Miran Pavlin) and Sweden (Johnny Ekström).
Document 12: Stefan Effenberg: Stefan Effenberg (] ; born 2 August 1968) is a retired German footballer who last managed SC Paderborn. A midfielder, he possessed leadership skills, fantastic passing range, powerful shooting ability, physical strength, but also a fearsome and controversial character.
Document 13: Stephan Straub: Stefan Straub (born 25 January 1971 in Tübingen) is a retired German footballer who last played for Alemannia Aachen in the 2nd Bundesliga.
Document 14: Stefan Wessels: Stefan Wessels (born 28 February 1979) is a retired German footballer who played as a goalkeeper.
Document 15: Thomas Ritter: Thomas Ritter (born 10 October 1967 in Görlitz) is a retired German footballer. He played one game for Germany on 13 October 1993 in a friendly against Uruguay, as a substitute for Stefan Effenberg.
ground_truth: SC Paderborn