Complex sentence: The Deutsches Derby is a Group 1 flat horse race in Germany for three-year-old thoroughbred colts and fillies run over a distance of 2,400 metres (approximately 1 mile 4 furlongs) at the Hamburg-Horn Racecourse, Hamburg in July.
Split into simpler sentences: The Deutsches Derby is a Group 1 flat horse race in Germany for three-year-old thoroughbred colts and fillies. It is run over a distance of 2,400 metres (approximately 1½ miles) at Hamburg-Horn Racecourse, Hamburg in July.