Question: In what year was the Spanish football team that plays in Segunda División B – Group 4 and features Francisco Javier Pérez Páez in central midfield founded?

Context paragraphs:
1999 Segunda División B play-offs: The 1999 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from Spanish 1998–99 Segunda División B to the 1999–2000 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.

2011 Segunda División B play-offs: The 2011 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from 2010–11 Segunda División B to the 2011–12 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 two teams which placed 16th to be relegated to the 2011–12 Tercera División.

2013 Segunda División B play-offs: The 2013 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from 2012–13 Segunda División B to the 2013–14 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 three teams which placed 16th to be relegated to the 2013–14 Tercera División.

2009 Segunda División B play-offs: The 2009 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from 2008–09 Segunda División B to the 2009–10 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 two teams which placed 16th to be relegated to the 2009–10 Tercera División.

2014 Segunda División B play-offs: The 2014 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) are the final playoffs for promotion from 2013–14 Segunda División B to the 2014–15 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 2014–15 Tercera División.

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.

1977–78 Segunda División B: The 1977–78 Segunda División B was the first season of Segunda División B, the third highest level of the Spanish football league system.  The league was made up of last 4 teams from 1976-77 Segunda División and 2nd to 10th teams from 1976-77 Tercera División.  In concept, the Segunda División B was identical to the old Tercera Division, which was now reduced to two divisions.  First and 2nd in each group were promoted to Segunda División, and the bottom three were relegated to the Tercera División.

2012 Segunda División B play-offs: The 2012 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from 2011–12 Segunda División B to the 2012–13 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 two teams which placed 16th to be relegated to the 2012–13 Tercera División.

Extremadura UD: Extremadura Unión Deportiva is a Spanish football team based in Almendralejo, in the autonomous community of Extremadura.  Founded in 2007 it plays in Segunda División B – Group 4, holding home games at "Estadio Francisco de la Hera".

Francisco Javier Pérez Páez: Francisco Javier "Javi" Pérez Páez (born 27 January 1986) is a Spanish footballer who plays for Extremadura UD as a central midfielder.

Supporting paragraphs: Francisco Javier Pérez Páez Extremadura UD
Answer: 2007