Question: Real Sociedad conducts the local derby against what inter-city rival team?

full_context: Document 1: 2015 Supercopa de España: The 2015 Supercopa de España was a two-legged football match-up that was played in August 2015 between Athletic Bilbao, runners-up of the 2014–15 Copa del Rey, and Barcelona, the champions of 2014–15 La Liga and the 2014–15 Copa del Rey. It was also a repetition of the 2015 Copa del Rey Final.
Document 2: Sport Mundi Tournament: The Sport Mundi Tournament is a Spanish pre-season women's football invitational charitable tournament held every August in Irun since 2005. It is contested by four teams, usually including regional powerhouses Athletic Bilbao and Real Sociedad. Athletic is the most successful team in the competition with four titles, followed by Levante UD and Real Sociedad with two each.
Document 3: Real Zaragoza: Real Zaragoza, S.A.D. (] ) is a Spanish football team based in Zaragoza, in the autonomous community of Aragon. Founded on 18 March 1932 it currently plays in Segunda División, holding home games at "La Romareda", which seats 34,596 spectators.
Document 4: List of Real Madrid C.F. seasons: Real Madrid Club de Fútbol is a team who compete 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 lost 3–1 in the semi-final of the Campeonato de Copa de S.M. Alfonso XIII against FC Barcelona. Real Madrid played against other local clubs in various regional tournaments disputed from 1902 to 1940. However, in 1929 the club became one of the founding members of La Liga, Spain's first national league. As of 2014, Real is one of only five clubs never to have been relegated from the top level of Spanish football, the others being Athletic Bilbao, FC Barcelona, Getafe and S.D. Eibar
Document 5: Real Sociedad: 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.
Document 6: Euskaltel–Euskadi: Euskaltel–Euskadi ("UCI team code:" EUS ) was a professional road bicycle racing team from Spain, Europe. The team was commercially sponsored, but was also partly funded by the Basque Government until the end of 2013, with riders either from the Basque Country, Navarre, La Rioja, Cantabria and the French Basque Country, or who had grown up in the cycling culture of those regions: This policy was abandoned to enable retention of World Tour status. Its sponsor was Euskaltel, a Basque telecom company. Euskaltel–Euskadi was famous for its all-orange team kits. Whenever the Tour de France passed through the Basque Country many spectators lined the route dressed in the team's orange or the colours of the Basque flag.
Document 7: 2013–14 Real Sociedad season: The 2013–14 season was Real Sociedad's 67th season in La Liga. Real Sociedad finished 7th in the league and reached the semifinals of the Copa del Rey. The Basque failed to make it out of the group stages of the UEFA Champions League.
Document 8: El Clásico: El Clásico (] ; Catalan: "El Clàssic" , ] ; "The Classic" ) is the name given in football to any match between fierce rivals Real Madrid and FC Barcelona. Originally it referred only to those competitions held in the Spanish championship, but nowadays the term has been generalized, and tends to include every single match between the two clubs: UEFA Champions League, Copa del Rey, etc. Other than the UEFA Champions League Final, it is considered one of the biggest club football games in the world, and is among the most viewed annual sporting events. The match is known for its intensity.
Document 9: Sevilla FC: Sevilla Fútbol Club, S.A.D. (] ), or simply Sevilla, is Spain’s oldest sporting club solely devoted to football. Sevilla FC is based in Seville, capital and largest city of the autonomous community of Andalusia. Sevilla FC is one of the teams that play in Spain’s top flight, La Liga. The club was formed on 25 January 1890, Scot Mr. Edward Farquharson Johnston being their first president. A few years later, on October 14, 1905, the club’s articles of association were registered in the Civil Government of Seville under the presidency of the Jerez-born José Luis Gallegos Arnosa.
Document 10: List of Real Madrid C.F. records and statistics: Real Madrid C.F. is a Spanish professional association football club based in Madrid. The club was formed in 1902 as "Madrid Football 'Club", and played its first competitive match on May 13, 1902, when it entered the semi-final of the Campeonato de Copa de S.M. Alfonso XIII. Real Madrid currently plays in the Spanish La Liga. 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, never to have been relegated from the league. They have also been involved in European football ever since they became the first Spanish club to enter the European Cup in 1955, except for the 1977–78 and 1996–97 seasons.
Document 11: Real Sociedad B: Real Sociedad de Fútbol B (also known as Sanse) is a Spanish football team based in San Sebastián, in the autonomous community of Basque Country. Founded in 1951, it is the reserve team of Real Sociedad and plays in Segunda División B, holding home games at "Campo José Luis Orbegozo" of the Zubieta Facilities.
Document 12: Basque derby: The Basque derby (in Basque "Euskal Derbia", in Spanish "derbi Vasco") is the name of the football local derby between Real Sociedad and Athletic Bilbao. It embodies the inter-city rivalry between the neighbouring provinces of Gipuzkoa and Biscay ("Bizkaia") in the Basque Country region of Spain.
Document 13: Canary Islands derby: The Canary Islands derby is the name given to football matches contesting Spanish sides UD Las Palmas and C.D. Tenerife, who are generally regarded as the top two sides in the Canary Islands. The Canary Islands derby is a match with a lot of rivalry and intensity that has always faced the islands of Gran Canaria and Tenerife and its inhabitants. According to World Soccer Magazine, the Canary Islands derby is on the list of the 50 greatest rivalries in the world and is considered one of the most important and spectacular derbies in Spain. Las Palmas have generally been more successful in derby matches.
Document 14: Real Sociedad C: Real Sociedad de Fútbol C is a Spanish football team based in San Sebastián, in the autonomous community of Basque Country. It is the second reserve team of Real Sociedad and plays in Tercera División – Group 4.
Document 15: List of Real Madrid C.F. players: 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.
ground_truth: Athletic Bilbao