Question: What is the capacity of the La Liga stadium in  which The Madrid Derby team plays their home games?

Context articles: Real Sociedad
Sports in Birmingham, Alabama
2014 Supercopa de España
List of Real Madrid C.F. players
Villarreal CF
CF Extremadura
Atlético Madrid
List of Real Madrid C.F. presidents
Madrid Derby
UD Las Palmas

Real Sociedad de Fútbol, S.A.D., more commonly referred to as Real Sociedad (] ; "Royal Society") or La Real, is a Spanish football club based in the city of San Sebastián, Basque Country, founded on 7 September 1909.
 It plays its home matches at the 32,000-capacity Anoeta Stadium.
 Real Sociedad won the Liga title in 1980–81 and 1981–82, and last finished runners-up in 2002–03.
 The club has also won the Copa del Rey twice, in 1909 and 1987.
 It contests the Basque derby against rivals Athletic Bilbao.
 Real Sociedad were founder members of La Liga in 1928, and its longest spell in the top flight was for 40 seasons, from 1967 to 2007.
Sports in Birmingham, Alabama include several minor league professional teams and college sports.
 The city of Birmingham and the Birmingham metro area have no major professional sport franchises.
 The Birmingham area is home to the Birmingham Barons, the AA minor league affiliate of the Chicago White Sox, which plays at Regions Field in the Southside adjacent to Railroad Park.
 The University of Alabama at Birmingham (UAB Blazers) has a popular basketball program, and Samford University, located in Homewood, has basketball and football teams.
 The Hoover Metropolitan Stadium in the suburb of Hoover is home to the Southeastern Conference Baseball Tournament which drew more than 108,000 spectators in 2006.
 There is also an amateur soccer association, known as La Liga.
 The Birmingham area also hosts the Alabama Alliance basketball and Tragic City Rollers roller derby teams.
The 2014 Supercopa de España was a two-legged football match-up played in August 2014 between the champions of 2013–14 La Liga, Atlético Madrid, and the winner of the 2013–14 Copa del Rey, Real Madrid.
 The first leg ended 1–1.
 Atlético won the trophy after beating Real Madrid 1–0 in second leg.
 This was the first time that the Supercopa de España was a Madrid derby, and also the first time since 2008 that the competition did not feature Barcelona team.
Real Madrid C.F. is a professional association football club based in Madrid, Spain, that plays in La Liga.
 The club was formed in 1902 as Madrid Football Club, and played its first competitive match on 13 May 1902, when it entered the semi-final of the Campeonato de Copa de S.M. Alfonso XIII.
 Real Madrid was one of the founding members of La Liga in 1929, and is one of three clubs, including FC Barcelona and Athletic Bilbao, to have never been relegated from the league.
 Since then, the club's first team has competed in numerous nationally and internationally organised competitions.
 Real is the most successful club in Spanish football, having won a total of 64 domestic titles; a record 33 La Liga titles, 19 Spanish Cups, 10 Spanish Super Cups, 1 Copa Eva Duarte and 1 League Cup.
 Real is the most successful club in European football, having won twenty one official UEFA trophies in total.
Villarreal Club de Fútbol, S.A.D. (), usually abbreviated to Villarreal CF or just Villarreal, is a Spanish football club based in Vila-real, a city in the province of Castellón within the Valencian Community.
 Founded in 1923, it plays in La Liga, holding home games at Estadio de la Cerámica, with a capacity of 24,890.
Club de Fútbol Extremadura was a Spanish football team based in Almendralejo, in the autonomous community of Extremadura.
 Founded in 1924, it played two seasons in La Liga, and held home games at "Estadio Francisco de la Hera", with a capacity of 11,580 seats.
 The club folded in 2010 following several years of financial problems.
Club Atlético de Madrid, SAD (] ), commonly known as Atlético Madrid, or simply as Atlético or Atleti, is a Spanish professional football club based in Madrid, that plays in La Liga.
 The club play their home games at the Wanda Metropolitano, which has a capacity of 68,000.
Real Madrid C.F. is a football club based in Madrid, Spain that competes in La Liga, the most senior football league in Spain.
 Since its founding in 1902, the club has had 19 different presidents.
 The club is owned by the club-members of Real Madrid C.F., and similarly to a limited liability company, they elect the president by a ballot.
 The president has the responsibility for the overall management of the club, including formally signing contracts with players and staff.
 In Spain, it is customary for the president to watch the games in which the first-team participates, together with the president from the opposing team.
El Derbi madrileño (English: The Madrid Derby ) is the name given to football matches between Real Madrid and Atlético Madrid, both of them from Madrid, Spain.
Unión Deportiva Las Palmas, S.A.D. is a Spanish football team based in Las Palmas, in the autonomous community of Canary Islands.
 Founded on 22 August 1949, it plays in La Liga, holding home games at the Estadio Gran Canaria, with a capacity of 33,111 seats.