Complex sentence: He was the team captain when the club earned promotion to the 2nd Bundesliga in 2004, but as Rot-Weiß Essen were relegated to the Regionalliga again the following year, Goldbæk retired his active career in summer 2005.
Split into simpler sentences: He was the team captain when the club earned promotion to the 2. Fußball-Bundesliga in 2004, but as Rot-Weiss Essen were relegated to the Regionalliga again the following year, Goldbæk retired his active career in summer 2005.