Complex sentence: The Palace House Stakes is a Group 3 flat horse race in the United Kingdom for three-year-old and above thoroughbreds run over a distance of 5 furlongs (1,006 metres) at Newmarket's Rowley Mile course in late April/early May.
Split into simpler sentences: The Palace House Stakes is a Group 3 flat horse race in the United Kingdom for three-year-old and above thoroughbreds. It is run over a distance of 5 furlongs (1,006 metres) on the Rowley Mile course at Newmarket in late April or early May.