Complex sentence: Years of hardship followed the death of Ashoona, which occurred sometime in the early to mid 1940s, and coincided with the early years of the Second World War and a decline in the market for furs.
Split into simpler sentences: Years of hardship followed the death of Ashoona, which occurred sometime in the early to mid 1940s. It coincided with the early years of the Second World War and a decline in the market for furs.