Complex sentence: His owners are Steve and Carolyn Coburn of Topaz Lake, Nevada, and Perry and Denise Martin from Yuba City, California of DAP Racing, who purchased his dam off the track for $8000.
Split into simpler sentences: His owners are Steve and Carolyn Coburn of Topaz Lake, Nevada; and Perry and Denise Martin from Yuba City, California of DAP Racing. They purchased his dam off the track for $8000.