Complex sentence: Britta Kamrau-Corestein (born 1979) is a German long distance swimmer and former European champion at the 5k, 10k and 25k Open Water distances and current World champion at 25k.
Split into simpler sentences: Britta Kamrau-Corestein (born 1979) is a German long distance swimmer. She is a former European champion at the 5k, 10k and 25k Open Water distances and current World champion at 25k.