Complex sentence: Therkel Mathiassen (5 September, 1892 in Favrbo, Denmark--14 March, 1967) was an archaeologist, anthropologist, cartographer, and ethnographer notable for his scientific study of the Arctic.
Split into simpler sentences: Therkel Mathiassen (5 September, 1892--14 March, 1967) was born in Favrbo, Denmark. He was an archaeologist, anthropologist, cartographer, and ethnographer notable for his scientific study of the Arctic.