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©ALEXANDRA WEY/EPA/MAXPPP - epa07771606 Swiss grass skier Stefan Portmann in action during a free practice at the Grasski World Championships in Marbach, Switzerland, 13 August 2019. About 80 participants from 10 nations will start at the Grasski - World Championships, which will take place from 13th to 18th August 2019. EPA-EFE/ALEXANDRA WEY