LONDON, ENGLAND - AUGUST 11:  Ajee Wilson of the United States, Melissa Bishop of Canada and  Noelie Yarigo of Benin compete in the Women's 800 metres semi finals during day eight of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 11, 2017 in London, United Kingdom.  (Photo by Matthias Hangst/Getty Images)