Complex sentence: At the 2008 Olympics, the silver medalist on vault, Oksana Chusovitina, was a 33-year-old mother; she received another silver medal on vault at the 2011 World Championships in Tokyo when she was 36.
Split into simpler sentences: At the 2008 Olympics, the silver medalist on vault, Oksana Chusovitina, was a 33-year-old mother. She received another silver medal on vault at the 2011 World Championships in Tokyo when she was 36.