Complex sentence: Marion "Preacher" Cox (died in 1996 of Alzheimer's disease) was a NASCAR Grand National Series car owner who provided a vehicle for Roy Bentley in four races that would take place in the 1955 and 1956 seasons.
Split into simpler sentences: Marion "Preacher" Cox (died in 1996 of Alzheimer's disease) was a NASCAR Grand National Series car owner. He provided a vehicle for now-retired NASCAR Grand National series driver Roy Bentley in four races that would take place in the 1955 and 1956 seasons.