Complex sentence: The Tiberias massacre took place on October 2,1938 during the 1936--1939 Arab revolt in Palestine, in the city of Tiberias, then under the control of the British Mandate of Palestine and today part of 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 it located in the State of Israel.