Complex sentence: Oliver was born on April 9,1904, in Coweta, Oklahoma, which at the time was still part of the Indian Territories; his parents died when he was young and he was raised by relatives in Okfuskee.
Split into simpler sentences: Oliver was born in Coweta, Oklahoma, which at the time was still part of the Indian Territories. His parents died when he was young and he was raised by relatives in Okfuskee.