Question: Who is the Chilean footballer who left Arsenal in 2018 to join the most expensive club in the world?

full_context: Document 1: Forbes' list of the most valuable football clubs: Rank Team Country Value In millions Debt as% of value% change on year Revenue ($M) Manchester United England 4,583 6 11 850 Barcelona Spain 3,635 6 688 Real Madrid Spain 3,580 - 2 688 Bayern Munich Germany 2,713 0 657 5 Manchester City England 2,083 5 8 650 6 Arsenal England 1,932 16 - 4 572 7 Chelsea England 1,845 0 11 583 8 Liverpool England 1,492 7 - 4 523 9 Juventus Italy 1,258 7 - 3 379 10 Tottenham Hotspur England 1,058 17 377 11 Paris Saint - Germain France 841 0 578 12 Borussia Dortmund Germany 808 0 - 3 315 13 A.C. Milan Italy 802 73 - 3 238 14 Atlético Madrid Spain 732 9 16 234 15 West Ham United England 634 11 17 213 16 Schalke 04 Germany 629 7 - 4 249 17 Roma Italy 569 - 2 242 18 Inter Milan Italy 537 37 - 4 199 19 Leicester City England 413 0 - 191 20 Napoli Italy 379 0 - 4 158
Document 2: Pierre-Emerick Aubameyang: Pierre - Emerick Aubameyang Aubameyang in 2014 Full name Pierre - Emerick Emiliano François Aubameyang Date of birth (1989 - 06 - 18) June 18, 1989 (age 29) Place of birth Laval, France Height 1.87 m (6 ft 2 in) Playing position Striker Club information Current team Arsenal Number 14 Youth career 1995 -- 1997 ASL L'Huisserie Football 1997 -- 1998 Nice 1998 -- 1999 ASL L'Huisserie Football 1999 -- 2001 Laval 2001 -- 2005 Rouen 2005 -- 2007 Bastia 2007 -- 2008 Milan Senior career * Years Team Apps (Gls) 2008 -- 2011 Milan 0 (0) 2008 -- 2009 → Dijon (loan) 34 (8) 2009 -- 2010 → Lille (loan) 14 (2) 2010 -- 2011 → Monaco (loan) 19 (2) 2011 → Saint - Étienne (loan) 33 (8) 2011 -- 2013 Saint - Étienne 54 (29) 2013 -- 2018 Borussia Dortmund 144 (98) 2018 -- Arsenal 13 (10) National team 2009 France U21 (0) 2012 Gabon U23 (1) 2009 -- Gabon 56 (23) * Senior club appearances and goals counted for the domestic league only and correct as of 16: 02, 13 May 2018 (UTC) ‡ National team caps and goals correct as of 16: 02, 13 May 2018 (UTC)
Document 3: FC Barcelona: In addition to membership, as of 2010[update] there are 1,335 officially registered fan clubs, called penyes, around the world. The fan clubs promote Barcelona in their locality and receive beneficial offers when visiting Barcelona. Among the best supported teams globally, Barcelona has the highest social media following in the world among sports teams, with over 90 million Facebook fans as of February 2016. The club has had many prominent people among its supporters, including Pope John Paul II, who was an honorary member, and former prime minister of Spain José Luis Rodríguez Zapatero. FC Barcelona has the second highest average attendance of European football clubs only behind Borussia Dortmund.
Document 4: Lionel Messi: Lionel Messi Messi with Argentina in November 2017 Full name Lionel Andrés Messi Cuccittini Date of birth (1987 - 06 - 24) 24 June 1987 (age 30) Place of birth Rosario, Argentina Height 1.70 m (5 ft 7 in) Playing position Forward Club information Current team Barcelona Number 10 Youth career 1994 -- 2000 Newell's Old Boys 2001 -- 2004 Barcelona Senior career * Years Team Apps (Gls) 2003 -- 2004 Barcelona C 10 (5) 2004 -- 2005 Barcelona B 22 (6) 2005 -- Barcelona 418 (383) National team 2004 -- 2005 Argentina U20 18 (14) 2008 Argentina U23 5 (2) 2005 -- Argentina 124 (64) Honours (show) Representing Argentina Olympic Games 2008 Beijing FIFA World Cup 2014 Brazil Copa América 2007 Venezuela 2015 Chile 2016 United States South American U-20 Championship 2005 Colombia FIFA U-20 World Cup 2005 Netherlands * Senior club appearances and goals counted for the domestic league only and correct as of 29 May 2018 ‡ National team caps and goals correct as of 16 June 2018
Document 5: Luis Suárez: Luis Suárez Suárez lining up for Uruguay at the 2018 FIFA World Cup Full name Luis Alberto Suárez Díaz Date of birth (1987 - 01 - 24) 24 January 1987 (age 31) Place of birth Salto, Uruguay Height 1.82 m (6 ft 0 in) Playing position Striker Club information Current team Barcelona Number 9 Youth career 2003 -- 2005 Nacional Senior career * Years Team Apps (Gls) 2005 -- 2006 Nacional 27 (10) 2006 -- 2007 Groningen 29 (10) 2007 -- 2011 Ajax 110 (81) 2011 -- 2014 Liverpool 110 (69) 2014 -- Barcelona 130 (110) National team 2006 -- 2007 Uruguay U20 (2) 2012 Uruguay U23 (3) 2007 -- Uruguay 103 (53) * Senior club appearances and goals counted for the domestic league only and correct as of 20 May 2018 ‡ National team caps and goals correct as of 15: 57, 6 July 2018 (UTC)
Document 6: Arsenal F.C.: In 1886, Woolwich munitions workers founded the club as Dial Square. In 1913, the club crossed the city to Arsenal Stadium in Highbury, becoming close neighbours of Tottenham Hotspur, and creating the North London derby. In 2006, they moved to the nearby Emirates Stadium. In terms of revenue, Arsenal is the ninth highest-earning football club in the world, earned €487.6m in 2016–17 season. Based on social media activity from 2014 to 2015, Arsenal's fanbase is the fifth largest in the world. In 2018, Forbes estimated the club was the third most valuable in England, with the club being worth $2.24 billion.
Document 7: Forbes' list of the most valuable football clubs: Rank Team Country Value In millions Debt as% of value% change on year Revenue ($M) Manchester United England 3,690 6 11 850 Barcelona Spain 3,635 6 688 Real Madrid Spain 3,580 - 2 688 Bayern Munich Germany 2,713 0 657 5 Manchester City England 2,083 5 8 650 6 Arsenal England 1,932 16 - 4 572 7 Chelsea England 1,845 0 11 583 8 Liverpool England 1,492 7 - 4 523 9 Juventus Italy 1,258 7 - 3 379 10 Tottenham Hotspur England 1,058 17 377 11 Paris Saint - Germain France 841 0 578 12 Borussia Dortmund Germany 808 0 - 3 315 13 A.C. Milan Italy 802 73 - 3 238 14 Atlético Madrid Spain 732 9 16 234 15 West Ham United England 634 11 17 213 16 Schalke 04 Germany 629 7 - 4 249 17 Roma Italy 569 - 2 242 18 Inter Milan Italy 537 37 - 4 199 19 Leicester City England 413 0 - 191 20 Napoli Italy 379 0 - 4 158
Document 8: Juventus F.C.: Juventus Football Club S.p.A. Type Public Traded as BIT: JUVE LSE: 0H65 Predecessor Sport - Club Juventus (1897) Foot - Ball Club Juventus (1900) Juventus (1936) Juventus Cisitalia (1943) Juventus Football Club (1945) Founded Turin, Italy (27 July 1967 (1967 - 07 - 27)) Key people Andrea Agnelli (Chairman) Pavel Nedvěd (Vice-chairman) Giuseppe Marotta (CEO and GM) Aldo Mazzia (CEO and CFO) Revenue €387,900,773 (2015 -- 16) €348,193,885 (2014 -- 15) Operating income €20,214,377 (2015 -- 16) €19,303,507 (2014 -- 15) Net income €4,062,312 (2015 -- 16) €2,298,263 (2014 -- 15) Total assets €577,558,246 (2015 -- 16) €474,268,339 (2014 -- 15) Total equity €53,383,558 (2015 -- 16) €44,645,444 (2014 -- 15) Owner Agnelli family (through EXOR N.V.) 63.8% Lindsell Train 10.0% Free floating 26.2% Number of employees 785 (2015 -- 16) 698 (2014 -- 15) Website juventus.com
Document 9: Alexis Sánchez: Alexis Sánchez Sánchez playing for Chile in 2017 Full name Alexis Alejandro Sánchez Sánchez Date of birth (1988 - 12 - 19) 19 December 1988 (age 29) Place of birth Tocopilla, Chile Height 1.69 m (5 ft 7 in) Playing position Forward / Winger Club information Current team Manchester United Number 7 Youth career 2004 -- 2005 Cobreloa Senior career * Years Team Apps (Gls) 2005 -- 2006 Cobreloa 47 (12) 2006 -- 2011 Udinese 95 (20) 2006 -- 2007 → Colo - Colo (loan) 32 (5) 2007 -- 2008 → River Plate (loan) 23 (4) 2011 -- 2014 Barcelona 88 (39) 2014 -- 2018 Arsenal 122 (60) 2018 -- Manchester United 12 (2) National team 2006 -- 2008 Chile U20 18 (4) 2006 -- Chile 121 (39) Honours (show) Representing Chile Winner Copa América 2015 Winner Copa América Centenario 2016 Runner - up FIFA Confederations Cup 2017 FIFA U-20 World Cup 2007 * Senior club appearances and goals counted for the domestic league only and correct as of 17: 00, 13 May 2018 (UTC) ‡ National team caps and goals correct as of 27 March 2018
Document 10: Zlatan Ibrahimović: Zlatan Ibrahimović Ibrahimović with Manchester United in 2016 Full name Zlatan Ibrahimović Date of birth (1981 - 10 - 03) 3 October 1981 (age 36) Place of birth Malmö, Sweden Height 1.95 m (6 ft 5 in) Playing position Striker Club information Current team Manchester United Number 10 Youth career Malmö BI FBK Balkan Malmö FF Senior career * Years Team Apps (Gls) 1999 -- 2001 Malmö FF 40 (16) 2001 -- 2004 Ajax 74 (35) 2004 -- 2006 Juventus 70 (23) 2006 -- 2009 Internazionale 88 (57) 2009 -- 2011 Barcelona 29 (16) 2010 -- 2011 → Milan (loan) 29 (14) 2011 -- 2012 Milan 32 (28) 2012 -- 2016 Paris Saint - Germain 122 (113) 2016 -- 2017 Manchester United 28 (17) 2017 -- Manchester United 0 (0) National team 1999 Sweden U18 (1) 2001 Sweden U21 7 (6) 2001 -- 2016 Sweden 116 (62) * Senior club appearances and goals counted for the domestic league only and correct as of 16 April 2017.
Document 11: Manchester United F.C.: Manchester United is one of the most popular football clubs in the world, with one of the highest average home attendances in Europe. The club states that its worldwide fan base includes more than 200 officially recognised branches of the Manchester United Supporters Club (MUSC), in at least 24 countries. The club takes advantage of this support through its worldwide summer tours. Accountancy firm and sports industry consultants Deloitte estimate that Manchester United has 75 million fans worldwide, while other estimates put this figure closer to 333 million. The club has the third highest social media following in the world among sports teams (after Barcelona and Real Madrid), with over 71 million Facebook fans as of September 2016. A 2014 study showed that Manchester United had the loudest fans in the Premier League.Supporters are represented by two independent bodies; the Independent Manchester United Supporters' Association (IMUSA), which maintains close links to the club through the MUFC Fans Forum, and the Manchester United Supporters' Trust (MUST). After the Glazer family's takeover in 2005, a group of fans formed a splinter club, F.C. United of Manchester. The West Stand of Old Trafford – the "Stretford End" – is the home end and the traditional source of the club's most vocal support.
Document 12: FC Barcelona: In 2010, Forbes evaluated Barcelona's worth to be around €752 million (USD $1 billion), ranking them fourth after Manchester United, Real Madrid, and Arsenal, based on figures from the 2008–09 season. According to Deloitte, Barcelona had a recorded revenue of €366 million in the same period, ranking second to Real Madrid, who generated €401 million in revenue. In 2013, Forbes magazine ranked Barcelona the third most valuable sports team in the world, behind Real Madrid and Manchester United, with a value of $2.6 billion. In 2014, Forbes ranked them the second most valuable sports team in the world, worth $3.2 billion, and Deloitte ranked them the world's fourth richest football club in terms of revenue, with an annual turnover of €484.6 million.
Document 13: List of Spanish football champions: Club Winners Runners - up Real Madrid 33 23 Barcelona 25 25 Atlético Madrid 10 9 Athletic Bilbao 8 7 Valencia 6 6 Real Sociedad Deportivo La Coruña Sevilla Real Betis 0
Document 14: Sergio Agüero: Sergio Agüero Agüero with Manchester City in 2016 Full name Sergio Leonel Agüero Date of birth (1988 - 06 - 02) 2 June 1988 (age 29) Place of birth Buenos Aires, Argentina Height 1.73 m (5 ft 8 in) Playing position Striker Club information Current team Manchester City Number 10 Youth career 1997 -- 2003 Independiente Senior career * Years Team Apps (Gls) 2003 -- 2006 Independiente 54 (23) 2006 -- 2011 Atlético Madrid 175 (74) 2011 -- Manchester City 189 (130) National team Argentina U17 5 (3) 2005 -- 2007 Argentina U20 7 (6) 2008 Argentina U23 5 (2) 2006 -- Argentina 83 (35) Honours (show) Representing Argentina Men's Football 2008 Beijing Team Competition FIFA World Cup Runner - up 2014 Brazil Team Copa América Runner - up 2015 Chile Team Runner - up 2016 USA Team * Senior club appearances and goals counted for the domestic league only and correct as of 23: 14, 5 November 2017 (UTC). ‡ National team caps and goals correct as of 11 November 2017
Document 15: James Rodríguez: James Rodríguez James Rodríguez training with Bayern Munich in 2018 Full name James David Rodríguez Rubio Date of birth (1991 - 07 - 12) 12 July 1991 (age 27) Place of birth Cúcuta, Colombia Height 1.80 m (5 ft 11 in) Playing position Attacking midfielder Winger Club information Current team Bayern Munich (on loan from Real Madrid) Number 11 Youth career 2001 -- 2005 Academia Tolimense de Fútbol 2005 -- 2006 Envigado Senior career * Years Team Apps (Gls) 2006 -- 2008 Envigado 30 (9) 2008 -- 2010 Banfield 42 (5) 2010 -- 2013 Porto 63 (25) 2013 -- 2014 Monaco 34 (9) 2014 -- Real Madrid 77 (28) 2017 -- → Bayern Munich (loan) 24 (7) National team 2007 Colombia U17 11 (3) 2011 Colombia U20 5 (3) 2011 -- Colombia 66 (21) Honours (show) Colombia Copa América Centenario 2016 United States * Senior club appearances and goals counted for the domestic league only and correct as of 20: 35, 24 August 2018 (UTC) ‡ National team caps and goals correct as of 28 June 2018
ground_truth: Alexis Sánchez
sub_queries: what is the most expensive club in the world Answer: Manchester United
chilean footballer who joined Manchester United from arsenal in 2018 Answer: Alexis Sánchez