article_snippet.sent: Veteran explorer Sir Ranulph Fiennes is receiving medical attention at the  Marathon des Sables after running for 30 hours in temperatures topping 50C. Sir Ranulph, 71, completed the most gruelling stage of the desert race today, but was taken straight to the medical tent because the exertion had begun to take straight to the medical tent toll on his heart.
article_snippet.sent: Sir Ranulph Fiennes, 71, was taken to the medical tent because of concerns for his heart .
highlights_snippet.sent: Sir Ranulph Fiennes is receiving medical attention at Marathon des Sables .
  