Complex sentence: He became world champion in the same discipline at the 2005 World Artistic Gymnastics Championships in Melbourne, Australia, and won bronze at the 2006 World Artistic Gymnastics Championships in Aarhus, Denmark.
Split into simpler sentences: He became world champion in the same discipline at the 2005 World Artistic Gymnastics Championships in Melbourne, Australia. He won bronze at the 2006 World Artistic Gymnastics Championships in Aarhus, Denmark.