Complex sentence: During the Canadian Arctic Expedition of 1913-1918, Canadian ethnographer Diamond Jenness spent two years living with and documenting the lives of Copper Inuit and sent thousands of artifacts of their material culture to the Geological Survey of Canada.
Split into simpler sentences: During the Canadian Arctic Expedition of 1913-1918, Canadian ethnographer Diamond Jenness spent two years living with and documenting the lives of Copper Inuit. He sent thousands of artifacts of their material culture to the Geological Survey of Canada.