Question: The 2009–10 La Liga season was Xerex's first season as well which overall season for La Liga since it's establishment?
Context: The 2007–08 La Liga season, the 77th since its establishment, started on 25 August 2007 and finished on 18 May 2008.  Real Madrid defended their La Liga title successfully after a 2–1 victory over Osasuna.  This season, all European leagues ended earlier than the previous season, due to the UEFA Euro 2008 championship.  It also was the first year of the new La Liga television agreement that had La Sexta mark its first year of television broadcasting. The 2014–15 Valencia CF season was the club's 95th season in its history and its 80th in La Liga.  This was the first season since 1997–98 that Valencia would not compete in any European competition despite previous season's lowest position finish in six years.  Having missed out on European competition, the team competed in La Liga and the Copa del Rey.  In La Liga, they finished fourth, qualifying for the play-off round of the 2015–16 UEFA Champions League.  In the Copa del Rey, Valencia lost to Espanyol in the round of 16.  Dani Parejo was the club's top scorer in the league, with 12 goals, while Paco Alcácer was the club's top scorer overall, with 14 goals. The 2008–09 La Liga season (known as the "Liga BBVA" for sponsorship reasons) was the 78th since its establishment.  Real Madrid were the defending champions, having won their 31st La Liga title in the previous season.  The campaign began on 30 August 2008 and ended on 31 May 2009.  A total of 20 teams contested the league, 17 of which already contested in the 2007–08 season, and three of which were promoted from the Segunda División.  In addition, a new match ball – the Nike T90 Omni – served as the official ball for all matches. The 2013–14 La Liga season was the 83rd since its establishment.  Match days were drawn on 9 July 2013.  The season began on 17 August 2013 and ended on 18 May 2014 due to all top-flight European leagues ending earlier than the previous season because of 2014 FIFA World Cup.  Elche, Villarreal and Almería competed in La Liga this year after spending the previous season in lower leagues. The Spanish football champions are the winners of the primary football competition in Spain, La Liga.  The league is contested on a round robin basis and the championship awarded to the team that is top of the league at the end of the season.  La Liga, first established in 1929, originally contained ten teams.  Before La Liga's organization, the Copa del Rey—a regionalised cup competition—was effectively the national championship.  La Liga is contested in by 20 teams; the three lowest-placed teams are relegated to the Segunda División and replaced by the top three teams in that division.  Of the founding teams in La Liga, only Real Madrid, Barcelona and Athletic Bilbao have not been relegated.  The league was cancelled between 1936 and 1939 because of the Spanish Civil War. Lionel Andrés "Leo" Messi (] ; born 24 June 1987) is an Argentine professional footballer who plays as a forward for Spanish club Barcelona and the Argentina national team.  Often considered the best player in the world and regarded by many as the greatest of all time, Messi is the only player in history to win five FIFA Ballon d'Or awards, four of which he won consecutively, and a record-tying four European Golden Shoes.  He has won 29 trophies with Barcelona, including eight La Liga titles, four UEFA Champions League titles, and five Copas del Rey.  Both a prolific goalscorer and a creative playmaker, Messi holds the records for most official goals scored in La Liga (358), a La Liga season (50) and a club football season in Europe (73), a calendar year (91), as well as those for most assists made in La Liga (138) and the Copa América (11).  He has scored over 600 senior career goals for club and country. The 2011–12 La Liga season (known as the "Liga BBVA" for sponsorship reasons) was the 81st season of the top level Spanish association football competition.  The campaign began on 27 August 2011, and ended on 13 May 2012.  Real Madrid won the league for a record 32nd time in La Liga history after beating Athletic Bilbao on 2 May 2012.  The club broke a number of records including: 100 points in a single season, 121 goals scored, a goal difference of +89, 16 away wins, and 32 overall wins.  This season also saw Lionel Messi score a record 50 league goals in 37 games, making him the first and only player to score 50 goals in any of the major European leagues. The 2009–10 Spanish football season is Xerez's first season ever in Liga BBVA. The 2017–18 La Liga season, also known as La Liga Santander for sponsorship reasons, is the 87th since its establishment.  The season began on 18 August 2017 and is scheduled to conclude on 20 May 2018.  The fixtures of the 2017–18 season were released on 21 July 2017. The 2009–10 La Liga season (known as the "Liga BBVA" for sponsorship reasons) was the 79th La Liga since its establishment.  Barcelona were the defending champions, having won their 19th La Liga title in the previous season.  The campaign began on 29 August 2009 ended on 16 May 2010 due to all top-flight European leagues ending earlier than the previous season because of 2010 FIFA World Cup.
Answer: 79th