Question: The current assistant manager of Leicester City used to coach which team in the 2014-15 Season ?

full_context: Document 1: Ray Lewington: Raymond Lewington (born 7 September 1956) is an English retired footballer and current assistant manager of Crystal Palace FC. Previously he was the assistant manager of the England national football team. His son, Dean, is a professional footballer playing for Milton Keynes Dons.
Document 2: Gareth Southgate: Gareth Southgate (born 3 September 1970) is an English football manager and former player who played as a defender or as a midfielder. He is currently the manager of the England national team. He won the League Cup with both Aston Villa and Middlesbrough (in 1995–96 and 2003–04 respectively, and as captain), and captained Crystal Palace to win the First Division championship in 1993–94. He also reached an FA Cup and UEFA Cup final as a player, and made 57 appearances for the England national team, featuring in the 1998 FIFA World Cup and both the 1996 and 2000 European Championships. His playing career ended in May 2006 at the age of 35, and after more than 500 league appearances, he was subsequently appointed Middlesbrough manager. He served as manager of Middlesbrough from June 2006 until October 2009, then managed the England U21 team from 2013 to 2016, before becoming the England national team manager in 2016.
Document 3: 2014–15 Wolverhampton Wanderers F.C. season: The 2014–15 season was the 116th season of competitive league football in the history of English football club Wolverhampton Wanderers. The club competed in the second tier of the English football system, the Football League Championship, following their return to the second level after being promoted as champions from League One at the first attempt.
Document 4: List of Oxford United F.C. seasons: Oxford United F.C. is an English association football club originally formed in 1893 under the name Headington United. The club adopted its present name in 1960, and played in local Oxfordshire leagues until being elected into the Southern League in 1949. It was at this time the club turned professional. Oxford was elected into the Football League in 1962, replacing Accrington Stanley. Promotion to the Third Division in 1965, the club were promoted again 3 years later and enjoyed an eight-year spell in the Football League Second Division, before being relegated. "The U's" reached the top tier of English football in 1985 after successive promotions, where they stayed for 3 years. During this time United won their only piece of major silverware, the 1986 Football League Cup.
Document 5: Nigel Pearson: Nigel Graham Pearson (born 21 August 1963) is an English football manager and former professional player who is currently manager of OH Leuven. He previously managed Hull City, Southampton, Carlisle United and Leicester City and was assistant manager for England Under-21s and Newcastle United. During his playing career, he was a defender and played for Shrewsbury Town, Sheffield Wednesday and Middlesbrough.
Document 6: 2014–15 Leicester City F.C. season: The 2014–15 season was Leicester City F.C.'s 110th season in the English football league system and their 47th (non-consecutive) season in the top tier of English football. They participated in the 2014–15 Premier League, their first time in Premier League in ten years, having been promoted from the Championship as champions and they also participated in the 2014–15 FA Cup and 2014–15 Football League Cup.
Document 7: Michael Appleton: Michael Antony Appleton (born 4 December 1975) is an English football coach and former player who is currently the assistant manager of Leicester City.
Document 8: 2014–15 Oxford United F.C. season: The 2014–15 season was Oxford United's fifth season in League Two after returning from the Conference, and their first under new manager Michael Appleton. They finished 13th in the table, following an 8th-place finish in League Two in 2013–14. It was the club's 121st year in existence, their 115th of competitive football and their 66th since turning professional. This article covers the period from 1 July 2014 to 30 June 2015.
Document 9: Michael Owen: Michael James Owen (born 14 December 1979) is an English former footballer who played as a striker for Liverpool, Real Madrid, Newcastle United, Manchester United and Stoke City, as well as for the England national team. Since retiring from football, he has become a successful racehorse breeder and owner.
Document 10: 2014–15 Olympique de Marseille season: The 2014–15 Olympique de Marseille season is the 65th professional season of the club since its creation in 1899 and 19th consecutive season in the top flight.
Document 11: Mikel Arteta: Mikel Arteta Amatriain (born 26 March 1982) is a retired Spanish professional footballer who played as a midfielder. He is currently the co-assistant coach of Manchester City, alongside fellow co-assistant Brian Kidd, Domènec Torrent and manager Pep Guardiola.
Document 12: Mark Hughes: Leslie Mark Hughes, OBE (born 1 November 1963) is a Welsh football manager and former player. He is the current manager of English Premier League club Stoke City.
Document 13: 2012–13 Oxford United F.C. season: Oxford United F.C. season 2012–13 was the club's third season in League Two after returning from the Conference. Oxford United had finished 9th in League Two in 2011–12 and failed to improve on this position in 2012–13. The club's opening nine league fixtures, consisting of three wins followed by six defeats, set the tone of a campaign in which the club were never serious contenders for a playoff place and which alternated between winning and losing streaks; a case in point was the three-game run of victories at the end of the season after the possibility of promotion had disappeared, which put a somewhat flattering gloss on Oxford's final position. They were knocked out by higher-division opposition in the early rounds of both the FA Cup and League Cup (including elimination at the hands of Sheffield United from the former competition for the second year in succession), but reached the Area Semi-final of the Football League Trophy and won the Oxfordshire Senior Cup.
Document 14: 2014–15 Torquay United F.C. season: The 2014–15 Torquay United F.C. season is Torquay United's 1st season in the Conference Premier since relegation of the 2013-14 season. The season runs from 1 July 2014 to 30 June 2015.
Document 15: List of Oxford United F.C. players: Oxford United F.C. is an English professional association football club based in Oxford. As of the 2015–16 season, the team plays in the League Two, which is the fourth level of the English football league system. The club was formed in 1893 as Headington before adding the suffix United six years later to become Headington United F.C. The club retained this name until 1960, when it was changed to Oxford United to give it a higher profile. The club was elected into the Southern Football League in 1949, where they stayed until replacing Accrington Stanley in the Football League in 1962. The club spent 44 years in the Football League, reaching the First Division at the end of the 1984–85 season and spending three years in the top tier. Oxford United spent four years in non-league football, before being promoted through the play-offs at the end of the 2009–10 season.
ground_truth: Oxford United