 Complete the following phrase:  Emma Coburn born October 19, 1990 is an American middle-distance runner who specializes in the 3000 meter steeplechase. At the 2017 World Championships in London, Coburn won the 3000 metres steeplechase with a time of 9.02.58, breaking her own American record. This made her the first American woman to win a gold medal in the steeplechase at the World Championships. Previously, she set an American record of 9:07.63 in the 