Question: William Ashley Magarey is best nown for coming up with an idea of a medal in which league?
Sentence (from "William Ashley Magarey"): He was the first chairman of the South Australian Football Association (SAFA) (later named South Australian National Football League (SANFL)), and a South Australian first-class cricketer, but he is best known for coming up with the idea of the Magarey Medal.
Relevant evidence: Yes