Complex sentence: The Sophienhöhe (290 m AMSL) is an artificial hill created by surface mining at the open cast brown coal mine operated by Rheinbraun AG in North Rhine-Westphalia, Germany, close to the cities of Jülich and Düren.
Split into simpler sentences: The Sophienhöhe (290 m AMSL) is artificial hill arose by surface mining at an open cast mining. It is located in North Rhine-Westphalia, Germany close to the cities of Jülich and Düren.