Question: What is the birthyear of the figure skater who won a silver medal at the 1992 World Championships and was attacked by Tonya Harding?
Sentence (from "Gillis Grafström"): Grafström has the further distinction of being the only person to have won an individual gold medal in both the Summer (1920) and Winter Olympics (1924, 1928), although Eagan remains the only one to have managed the feat in different disciplines.
Relevant evidence: No