Question: When was the brother of Alfrederick born who was also  three-time Olympic gold medalist ?
Sentence (from "Al Joyner"): He was also the husband of three-time Olympic gold medalist and world 100 m and 200 m record holder Florence Griffith Joyner and is the brother of three-time Olympic gold medalist and world heptathlon record holder Jackie Joyner-Kersee.
Relevant evidence: Yes