Question: Real Sociedad conducts the local derby against what inter-city rival team?
Context: 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. 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. The Tyne-Wear derby, also known as the North East derby and the Wear-Tyne derby is a local derby between the association football clubs Sunderland and Newcastle United.  The derby is an inter-city rivalry in North East England with the two cities of Sunderland and Newcastle just twelve miles apart.  Sunderland play their home matches at the Stadium of Light whilst Newcastle play their home matches at St. James' Park.  The first meeting of the two sides took place in 1883, with the first competitive fixture being an 1888 FA Cup tie, which Sunderland won 2–1.  To date, both teams have won the fixture 53 times, whilst sharing 49 draws – one of which Sunderland went on to win via a penalty shootout.  Sunderland have dominated the Tyne–Wear derby in recent seasons.  They are currently undefeated in the last nine matches between the local rivals, including six consecutive victories from 14 April 2013 to 25 October 2015.  The most recent meeting of the two sides, on the 20th March 2016, was a Premier League match at the St James' Park and ended in a 1–1 draw, with Jermain Defoe opening the scoring for Sunderland before Aleksandar Mitrovic equalised for Newcastle.  Yann M'Vila, who has played in both games, describes it as bigger than the Milan derby. The Derby della Capitale (English: Derby of the capital city ), also known as Derby Capitolino and Derby del Cupolone, as well as The Rome Derby in English and Derby di Roma in Italian, is the football local derby in Rome, Italy, between Roma and Lazio.  It is considered to be the fiercest intra-city derby in the country ahead of the other major local derbies, Derby della Madonnina (Milan derby) and Derby della Mole (Turin derby), and one of the greatest and hotly contested derbies in Europe. 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. Lippo Hertzka (19 November 1904 – 14 March 1951) was a Hungarian football player and manager.  He played for Essener Turnerbund, MTK Budapest and Real Sociedad.  After retiring, he coached seven teams, including Real Sociedad and Real Madrid, a team which he coached for 2 years (1930–1932) and led to an undefeated La Liga championship during the 1931-32 season, which meant the first La Liga title for the "white" squad.  He also won two league titles in Portugal for Benfica. The Liverpool F.C.–Manchester United F.C. rivalry, also known as the North-West Derby, is a high-profile inter-city rivalry between English professional football clubs Liverpool and Manchester United.  It is considered to be one of the biggest rivalries in the football world along with the Old Firm derby in Scotland, Superclásico in South America, El Clásico in Spain, and Derby della Madonnina in Italy, and is considered the most famous fixture in English football.  Players, fans and the media alike often consider games between the two clubs to be their biggest rivalry, above even their own local derby competitions with Everton and Manchester City, respectively. 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. 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. 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.
Answer: Athletic Bilbao