article_snippet.sent: Some of the best middle distance runners in the world will be in the field so I will have to be at my best to compete with Some of the best middle distance runners in the world.'
article_snippet.sent: Jessica Ennis-Hill became a national hero when Jessica Ennis-Hill won heptathlon gold at the London 2012 Olympics .
article_snippet.sent: All three won their gongs the same day three years ago in the 10,000 metres, heptathlon and long jump respectively.
article_snippet.sent: their return to the Olympic Stadium as part of a three-day extravaganza involving some of the world’s finest athletes.
highlights_snippet.sent: Olympic gold medalist wants to prepare for World Championships .
  