Original sentence: During the British mandate in Palestine, Arab political violence directed against the British and against Zionist settlement included the Jerusalem pogrom of April, 1920, the riots in Palestine of May, 1921, the 1929 Hebron massacre and Safed massacre, and the 1936-1939 Arab revolt in Palestine
Edited sentence: During the British mandate in Palestine, Arab terrorism directed against the British and against Zionist settlement included the Jerusalem pogrom of April, 1920, the riots in Palestine of May, 1921, the 1929 Hebron massacre and Safed massacre, and the 1936-1939 Arab revolt in Palestine