Stina Nilsson of Sweden (C), Kathrine Rolsted Harsem of Norway (R back) and Ingvild Flugstad Oestberg of Norway (back) compete during the women's 1.4 km sprint semifinal event at the FIS Cross Country 13th World Cup in Otepaa, Estonia, Feb. 18, 2017. (Xinhua/Sergei Stepanov)