Complex sentence: In 1971, Earnhardt married his second wife, Brenda Gee (the daughter of NASCAR car builder Robert Gee), with whom he had a daughter, Kelley King, in 1972, and a son, Dale Earnhardt, Jr., in 1974.
Split into simpler sentences: In 1971, Earnhardt married his second wife, Brenda Gee-the daughter of NASCAR car builder Robert Gee. With Gee, he had two more children: a daughter, Kelley King, in 1972, and a son, Dale Earnhardt, Jr., in 1974.