Question: The 2004-05 season saw Futbol Club Barcelona restructure, following the retirement of a Spanish former professional footballer, and a current manager, who was born on May 8th in what year?

Context paragraphs:
2004–05 FC Barcelona season: The 2004-05 season saw Fútbol Club Barcelona end their six-year wait for the La Liga title, having not won the league or, indeed, any trophy since the 1998–99 season and thus La Liga trophy returned in Barcelona's trophy room.  Having finished second in La Liga the previous season, Barcelona once again competed in the UEFA Champions League as well as the Copa del Rey.  The squad was restructured significantly following the retirement of key players Luis Enrique and Marc Overmars, as well as the return of Edgar Davids to Juventus and first team regulars Patrick Kluivert and Phillip Cocu moving onto new clubs.  Ronaldinho's and new signing Samuel Eto'o's performances won them places in FIFPro's XI of 2004–05.  Ronaldinho was later named FIFA World Player of the Year for 2005 for the second time in succession and with the highest points total ever; Eto'o came third.  This season was also notable for the debut of Lionel Messi.

2008–09 FC Barcelona season: In 2008–09, Futbol Club Barcelona started a new era with a new manager, former player and Barcelona Atlètic coach Pep Guardiola, who led the team to the first treble in Spanish football history.  After selling off high-profiled players such as Deco and Ronaldinho, Barcelona played scintillating football throughout the season, winning the Copa del Rey, La Liga and the UEFA Champions League.  This Barcelona squad is considered as one of the best in history.

2014–15 FC Barcelona season: The 2014–15 season was Futbol Club Barcelona's 115th in existence and the club's 84th consecutive season in the top flight of Spanish football.  It was one of the most successful seasons in the club's history as they clinched the Treble by winning La Liga, Copa del Rey and the UEFA Champions League.  By doing so, the Catalans became the first European team to twice win the domestic double as well as the highest continental tournament, after winning their first treble in the 2008–09 season.  Barcelona's success was due to a large extent to their formidable forward trio composed of Lionel Messi, Neymar and summer signing Luis Suárez, who scored an unprecedented total of 122 goals in all competitions to become the trio with most goals in Spanish football history.

Luis Enrique (footballer): Luis Enrique Martínez García (] ; born 8 May 1970), known as Luis Enrique, is a Spanish former professional footballer, and a current manager.

2012–13 FC Barcelona season: The 2012–13 season was Futbol Club Barcelona's 113th in existence and the club's 82nd consecutive season in the top flight of Spanish football.  The season marked the managerial debut of Tito Vilanova, who served as Pep Guardiola's longtime assistant.  Vilanova assumed management of the club after Guardiola, who had managed Barcelona for the prior four seasons, declined to renew his contract.

List of FC Barcelona records and statistics: Futbol Club Barcelona (] ), also known as Barcelona and familiarly as Barça, is a professional football club, based in Barcelona, Catalonia, Spain.  Founded in 1899 by a group of Swiss, English and Catalan footballers led by Joan Gamper, the club has become a symbol of Catalan culture and Catalanism, hence the motto ""Més que un club"" (More than a club).  The official Barça anthem is the "Cant del Barça", written by Jaume Picas and Josep Maria Espinàs.  Unlike many other football clubs, the supporters own and operate Barcelona.  It is the world's second richest football club in terms of revenue, with an annual turnover of €495 million in 2011–12 season.

2007–08 FC Barcelona season: Though it did not produce silverware, Futbol Club Barcelona's 2007–08 season would mark a period of change within the club, having many firsts and lasts.  Most importantly, this would be Ronaldinho's last season with the club, being displaced by the coming of Arsenal legend Thierry Henry.  This season also marked the breakthrough of young talent Bojan into the first team, as well as the emergence of Lionel Messi as one of the team's key players.  On the other hand, this would be Lilian Thuram's last season as a professional footballer, as well as Gianluca Zambrotta's last with the club.

2010–11 FC Barcelona season: The 2010–11 season was Futbol Club Barcelona's 111th in existence and the club's 80th consecutive season in the top flight of Spanish football.  Barcelona will start the season with a new president after Joan Laporta reached his term limit on 30 June, leaving behind a very successful club tenure.

History of FC Barcelona: The history of Futbol Club Barcelona goes from the football club's founding in 1899 and up to current time.  FC Barcelona, also known simply as Barcelona and familiarly as Barça, is based in Barcelona, Catalonia, Spain.  The team was founded in 1899 by a group of Swiss, English and Spanish footballers led by Joan Gamper.  The club played amateur football until 1910 in various regional competitions.  In 1910, the club participated in their first of many European competitions, and has since amassed fourteen UEFA trophies and a sextuple.  In 1928, Barcelona co-founded La Liga, the top-tier in Spanish football, along with a string of other clubs.  As of 2017, Barcelona has never been relegated from La Liga, a record they share with Athletic Bilbao and arch-rival Real Madrid.

2005–06 FC Barcelona season: The 2005–06 season was Futbol Club Barcelona's 107th season in existence and 77th consecutive season in the top flight of Spanish football, La Liga.  It was manager Frank Rijkaard's third season in charge of the club, a season in which he managed to successfully retain the La Liga title, as well as winning the UEFA Champions League and Spanish Super Cup.  The squad was largely unchanged from the previous season, with only two players – Santiago Ezquerro and Mark van Bommel – joining the club.  Gerard left on a free transfer during the summer.

Supporting paragraphs: 2004–05 FC Barcelona season Luis Enrique (footballer)
Answer: 1970