Complex sentence: He also swam in the 50m freestyle, 100m freestyle failing to make the final in either, he finished eighth in the 100m butterfly and fifth in the 100m breaststroke.
Split into simpler sentences: He also swam in the 50m freestyle, 100m freestyle, failing to make the final in either. He finished eighth in the 100m butterfly and fifth in the 100m breaststroke.