Complex sentence: The law played a major role in the events in Dersim in 1938 known as the Dersim Massacre, the depopulation of Dersim in Turkish Kurdistan in 1937-1938, where, according to McDowall, 40,000 people were killed.
Split into simpler sentences: The law played a major role in the events in Dersim in 1938 known as the Dersim Massacre. The Dersim massacre refers to the depopulation of Dersim in Turkish Kurdistan in 1937-1938, where, according to McDowall, 40,000 people were killed.