Complex sentence: The Irish Oaks is a Group 1 flat horse race in the Republic of Ireland for three-year-old thoroughbred fillies run over a distance of 1 mile and 4 furlongs (2,414 metres) at the Curragh in July.
Split into simpler sentences: The Irish Oaks is a Group 1 flat horse race in the Republic of Ireland for three-year-old thoroughbred fillies. It is run over a distance of 1 mile and 4 furlongs (2,414 metres) at the Curragh in July.