Complex sentence: Rudolf Kraj (born December 5,1977) is a Czech boxer, who won the silver medal in the men's Light Heavyweight (81 kg) category at the 2000 Summer Olympics in Sydney.
Split into simpler sentences: Rudolf Kraj (born December 5,1977) is a Czech boxer. He won the silver medal in the men's Light Heavyweight (81 kg) category at the 2000 Summer Olympics in Sydney.