Complex sentence: Häggkvist has represented Sweden at the Eurovision Song Contest on three occasions: in 1983, finishing third; in 1991, winning the contest; and in 2006, finishing fifth, which makes her one of the artists with the best track record in Eurovision history.
Split into simpler sentences: Häggkvist has represented Sweden at the Eurovision Song Contest on three occasions: in 1983, finishing third; in 1991, winning the contest; and in 2006, finishing fifth. Which makes her one of the artists with the best track record in Eurovision history.