Complex sentence: In the 2004 Olympics in Athens, Andrianova was 5th in the final, so in the 2005 World Championships she was a favourite, however when she received a bronze medal she regarded it as a defeat.
Split into simpler sentences: In the 2004 Olympics in Athens, Andrianova was 5th in the final, so in the 2005 World Championships she was a favourite. When she received a bronze medal, she regarded it as a defeat.