Complex sentence: Hemingway had permanent residences in Key West, Florida (1930s) and Cuba (1940s and 1950s), and in 1959, he bought a house in Ketchum, Idaho, where he committed suicide in the summer of 1961.
Split into simpler sentences: Hemingway had permanent residences in Key West, Florida (1930s), and Cuba (1940s and 1950s). In 1959 he bought a house in Ketchum, Idaho, where he committed suicide in the summer of 1961.