Complex sentence: The Bavarian Open is an annual international figure skating competition organized by the Skating Union of Bavaria and since 2011, it has been sanctioned by the Deutsche Eislauf Union and the International Skating Union.
Split into simpler sentences: The Bavarian Open is an annual international figure skating competition organized by the Skating Union of Bavaria. Since 2011, it is sanctioned by the Deutsche Eislauf Union and the International Skating Union.