Complex sentence: The Tiberias massacre took place on 2 October 1938, during the 1936--39 Arab revolt in Tiberias, then located in the British Mandate of Palestine and today is located in the State of Israel.
Split into simpler sentences: The Tiberias massacre took place on October 2,1938, during the 1936--1939 Arab revolt in Palestine, in the city of Tiberias. Tiberias was then located in the British Mandate of Palestine and today is located in the State of Israel.