Complex sentence: A native of Omaha, Nebraska and a casino operator from the beginning of the post-World War II era in America, he retained ownership of the El Cortez Hotel & Casino however Barrick had the option to purchase the properity on first refusal.
Split into simpler sentences: A native of Omaha, Nebraska and a casino operator from the beginning of the post-World War II era, he retained ownership of the El Cortez Hotel & Casino. In the deal, Barrick had the option to purchase the properity on right of first refusal.