<Li> ^ Sullivan broke the Olympic and world record for the men's 100 m freestyle in the second semi-final of the 2008 Summer Olympics . </Li> <Li> ^ Murphy broke the Olympic and world record for the men's 100 m backstroke in the men's 4 × 100 m medley relay final of the 2016 Summer Olympics . </Li> <Li> ^ Watanabe broke the Olympic record for the men's 200 m breaststroke in the first semi-final of the 2016 Summer Olympics . </Li> <Li> ^ Seebohm broke the Olympic record for the women's 100 m backstroke in the fourth heat of the 2012 Summer Olympics . </Li>

What is the olympic record for 100m freestyle