Complex sentence: Katherine Grainger CBE (born 12 November 1975 in Glasgow) is a British rower, 2012 Summer Olympics gold medallist, three-time Olympic silver medalist and six-time World Champion.
Split into simpler sentences: Katherine Grainger CBE (born 12 November 1975 in Glasgow) is a British rower and a 2012 Olympic gold medalist. Grainger is also a three-time Olympic silver medalist and six-time World Champion.