Question: The 2015 Segunda División play-offs took place in June 2015 and has determined the third team which will be promoted to which season that started on 21 August 2015 and concluded on 15 May 2016?

full_context: Document 1: 2013 Segunda División play-offs: The 2013 Segunda División play-offs took place in June 2013. The Segunda División promotion phase (known as "Promoción de ascenso") was the second phase of 2012–13 Segunda División and was to determine the third team which promoted to 2013–14 La Liga. Teams placed between third and sixth position (excluding reserve teams) took part in the promotion play-offs.
Document 2: 2015 Segunda División play-offs: The 2015 Segunda División play-offs took place in June 2015 and has determined the third team which will be promoted to the top division. Teams placed between 3rd and 6th position (excluding reserve teams) are taking part in the promotion play-offs.
Document 3: 2015 Tercera División play-offs: The 2015 Tercera División play-offs to Segunda División B from Tercera División (Promotion play-offs) were the final playoffs for the promotion from 2014–15 Tercera División to 2015–16 Segunda División B. The first four teams in each group took part in the play-off.
Document 4: 2015–16 La Liga: The 2015–16 La Liga football season (known as the "Liga BBVA" for sponsorship reasons) was the 85th since its establishment. Barcelona were the defending champions. It started on 21 August 2015 and concluded on 15 May 2016. Barcelona retained the title, winning it for the second consecutive season (their 24th Liga title) after beating Granada 3–0 on the final matchday.
Document 5: 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.
Document 6: 2015 Segunda División B play-offs: The 2015 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) are the final playoffs for promotion from 2014–15 Segunda División B to the 2015–16 Segunda División. The four first placed teams in each of the four Segunda División B groups join the "Playoffs de Ascenso" and the four last placed teams in Segunda División will be relegated to Segunda División B. It also decides the teams which placed 16th to be relegated to the 2015–16 Tercera División.
Document 7: 2009–10 La Liga: 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.
Document 8: 2010–11 La Liga: The 2010–11 La Liga season (known as the "Liga BBVA" for sponsorship reasons) was the 80th since its establishment. The campaign began on 28 August 2010 and ended on 21 May 2011. A total of 20 teams contested the league, 17 of which already contested in the 2009–10 season and three of which were promoted from the Segunda División. In addition, a new match ball – the Nike Total 90 Tracer – served as the official ball for all matches.
Document 9: 2017 Segunda División play-offs: The 2016–17 Segunda División play-offs took place in June 2017 and will determine the third team which will be promoted to the top division. Teams placed between 3rd and 6th position excluding reserve teams will take part in the promotion play-offs.
Document 10: 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.
Document 11: 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.
Document 12: 2012 Segunda División play-offs: The 2012 Segunda División play-offs took place in June 2012. The Segunda División promotion phase (known as "Promoción de ascenso") was the second phase of 2011–12 Segunda División and was to determine the third team which promoted to 2012–13 La Liga. Teams placed between 3rd and 6th position (excluding reserve teams) took part in the promotion play-offs.
Document 13: 2006 Segunda División B play-offs: The 2006 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from 2005–06 Segunda División B to the 2006–07 Segunda División. The four first placed teams in each of the four Segunda División B groups played the "Playoffs de Ascenso" and the four last placed teams in Segunda División were relegated to Segunda División B. It also decided the one team which placed 16th to be relegated to the 2006–07 Tercera División.
Document 14: 2014 Segunda División play-offs: The 2014 Segunda División play-offs took place in June 2014 and has determined the third team which will be promoted to the top division. Teams placed between 3rd and 6th position (excluding reserve teams) are taking part in the promotion play-offs.
Document 15: 2015 Supercopa de España: The 2015 Supercopa de España was a two-legged football match-up that was played in August 2015 between Athletic Bilbao, runners-up of the 2014–15 Copa del Rey, and Barcelona, the champions of 2014–15 La Liga and the 2014–15 Copa del Rey. It was also a repetition of the 2015 Copa del Rey Final.
ground_truth: 2015–16 La Liga