Question: In which reserve team of Sevilla Federico San Emeterio Díaz played as a central midfielder?

full_context: Document 1: Atlético Madrid B: Club Atlético de Madrid B is a Spanish football team based in Madrid, in the community of Madrid. Founded in 1966, it is the reserve team of Atlético Madrid and currently plays in Segunda División B – Group 1. They play their home games at Cerro del Espino Stadium.
Document 2: CD Toledo: Club Deportivo Toledo, S.A.D. is a Spanish football team based in Toledo, in the autonomous community of Castile-La Mancha. Founded in 1928 it plays in Segunda División B – Group 1, holding home games at "Estadio Salto del Caballo", with a seating capacity of 5,300 spectators.
Document 3: Éver Banega: Éver Maximiliano David Banega (] ; born 29 June 1988) is an Argentine professional footballer who plays for Spanish club Sevilla FC and the Argentina national team as a central midfielder.
Document 4: 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 5: 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 6: Fede San Emeterio: Federico San Emeterio Díaz (born 16 March 1997), known simply as Fede, is a Spanish footballer who plays for Sevilla Atlético as a central midfielder.
Document 7: Sevilla Atlético: Sevilla Atlético Club is a Spanish football team based in Seville in the autonomous community of Andalusia. Founded in 1958 it plays in Segunda División and is the reserve team of Sevilla FC, holding home games at "Viejo Nervión", with a 7,500-seat capacity.
Document 8: Sevilla FC (Superleague Formula team): Sevilla FC Superleague Formula team is the racing team of Sevilla FC, a football team that competes in Spain in the La Liga. The Sevilla FC racing team competed in the Superleague Formula. They were operated by GTA Motor Competición.
Document 9: Borja San Emeterio: Borja San Emeterio Díaz (born 16 March 1997), known simply as Borja, is a Spanish footballer who plays for Sevilla Atlético as a right back.
Document 10: Fernando San Emeterio: Fernando San Emeterio Lara (born January 1, 1984) is a Spanish professional basketball player who plays for Valencia Basket of the Liga ACB. He was an All-EuroLeague First Team selection in 2011, as well as the ACB MVP the same year.
Document 11: Koke (footballer, born 1992): Jorge Resurrección Merodio (born 8 January 1992), known as Koke (] ), is a Spanish professional footballer who plays for Atlético Madrid and the Spain national team as a midfielder.
Document 12: 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 13: Sergio Busquets: Sergio Busquets Burgos (] , ] ; born 16 July 1988) is a Spanish professional footballer who plays as a defensive midfielder for FC Barcelona and the Spain national team.
Document 14: FC Cartagena: Fútbol Club Cartagena is a Spanish football team based in Cartagena, in the autonomous community of Murcia. Founded in 1995 it currently plays in Segunda División B, holding home games at "Estadio Cartagonova", with a capacity of 15,105 spectators.
Document 15: Fernando Torres: Fernando José Torres Sanz (] ; born 20 March 1984) is a Spanish professional footballer who plays as a striker for La Liga club Atlético Madrid and the Spain national team.
ground_truth: Sevilla Atlético