Question: What is the capacity of the stadium opened by the eigth president of FIFA and Michel Platini?

Context paragraphs:
Amara Simba: Amara Simba (born 23 December 1961), Dakar, Senegal is a retired French football player.  During his career he played for Paris SG, AS Cannes, AS Monaco, SM Caen and Lille OSC in France, Club Leon in Mexico and Leyton Orient, Kingstonian, Kettering Town, Barnet, St. Albans City and Billericay in England.  He was also selected to play for the French national team on three occasions by then manager Michel Platini in which he scored one goal, but injury prevented his participation in Euro 92 and his international career came to an end.

West Germany v France (1982 FIFA World Cup): West Germany v France was a FIFA World Cup semi-final match that took place in the Estadio Ramón Sánchez Pizjuán stadium in Seville, Spain on 8 July 1982.  The match was won by West Germany on penalty kicks (5–4); West Germany advanced to face Italy in the final.  Thanks to its back-and-forth drama, four goals in extra time, and a dramatic penalty shootout, this game is regarded not only as the best of the 1982 tournament, but one of the best World Cup games of all time.  It is considered by French captain Michel Platini to be his "most beautiful game."  West Germany's victory was the first time in World Cup finals history that a shootout determined the outcome.

Match fixing in association football: The issue of match fixing in association football has been described, in 2013, by Chris Eaton, the former Head of Security of FIFA (the sport's world governing body), as a "crisis", while UEFA's president Michel Platini has said that if it continues, "football is dead."  Zhang Jilong, president of the Asian Football Confederation, has stated that it is a "pandemic."  The issue also affects a number of other sports across the world.

Commerzbank-Arena: Commerzbank-Arena (] , sometimes ] ) is a sports stadium in Frankfurt, Hesse, Germany.  Commonly known by its original name, Waldstadion ] (English: Forest Stadium ), the stadium opened in 1925.  The stadium has been upgraded several times since then; the most recent remodelling was its redevelopment as a football-only stadium in preparation for the 2005 FIFA Confederations Cup and 2006 FIFA World Cup.  With a capacity of 51,500 spectators for league matches and 48,500 for American Football and International Football matches, it is among the ten largest football stadiums in Germany.  The stadium was one of the nine venues of 2011 FIFA Women's World Cup, and hosted four matches including the final.

Bosnia and Herzegovina FA Training Centre: The Bosnia and Herzegovina FA Training Centre (Bosnian: Trening centar Nogometnog/Fudbalskog saveza Bosne i Herzegovine ) is the training ground of the Football Association of Bosnia and Herzegovina located in the Crkvičko brdo neighbourhood of Zenica, Zenica-Doboj Canton, Bosnia and Herzegovina.  The centre was officially inaugurated on 2 September 2013 by then-president of UEFA, Michel Platini, after the first stage of construction was completed.

Dalga Arena: Dalga Arena (Azerbaijani: "Dalğa Arena" ) is a multi-use stadium in Mardakan settlement of Baku, Azerbaijan.  It is currently used mostly for football matches.  The stadium holds 6,500 people and opened by Sepp Blatter and Michel Platini on 6 June 2011.

Stade de France: The Stade de France (] ) is the national stadium of France, located just north of Paris in the commune of Saint-Denis.  Its seating capacity of 81,338 makes it the sixth-largest stadium in Europe.  The stadium is used by the France national football team and French rugby union team for international competition.  Originally built for the 1998 FIFA World Cup, the stadium's name was recommended by Michel Platini, head of the organising committee.  On 12 July 1998, France defeated Brazil 3–0 in the 1998 FIFA World Cup Final contested at the stadium.  It will host the opening and closing ceremonies and the athletics events at the 2024 Summer Olympics.

Michel Platini Mesquita: Michel Platini Ferreira Mesquita or simply Michel Platini (born 8 September 1983 in Ceilândia) is a Brazilian footballer who currently plays for Anápolis as a forward.

Sepp Blatter: Joseph "Sepp" Blatter (born 10 March 1936) is a Swiss football administrator who was the eighth president of FIFA ("Fédération Internationale de Football Association") from 1998 to 2015.  He is currently serving a six-year ban from participating in FIFA activities.

William Gaillard: William Gaillard is the director of communications and public affairs for the Union of European Football Associations (UEFA).  He is also the Senior Advisor to the President of UEFA Michel Platini.

Supporting paragraphs: Dalga Arena Sepp Blatter
Answer: 6,500