Complex sentence: Weber competed in her first Worlds at the 1981 World Championships finishing in 10th place in the all-around and got her highest placement finishing 8th in all-around at the 1983 World Championships.
Split into simpler sentences: Weber competed in her first Worlds at the 1981 World Championships finishing in 10th place in the all-around. She got her highest placement finishing 8th in all-around at the 1983 World Championships.