Original sentence: The Glina massacre was the August 1941 killing of hundreds of Serbs by members of the far-right Croatian Ustaše movement in the town of Glina in Croatia
Edited sentence: American sources.Glina massacre (in English).The Glina massacre was the August 1941 killing between 2,500 and 3,000 (Yugoslav official sources) of Serbs by  Croatian Ustaše soldiers in the town of Glina in Croatia