Complex sentence: The Rheinland-Pokal is a Group 1 flat horse race in Germany for three-year-old and above thoroughbreds run over a distance of 2,400 metres (approximately 1 mile 4 furlongs) at the Weidenpesch Racecourse, Cologne in August.
Split into simpler sentences: The Rheinland-Pokal is a Group 1 flat horse race in Germany for three-year-old and above thoroughbreds. It is run over a distance of 2,400 metres (approximately 1 mile 4 furlongs) at the Weidenpesch Racecourse, Cologne in August.