Question: What is the population of the city in which Staffan Scheja was the awardee at the international Ferruccio Busoni International Piano Competition in 1975?
Sentence (from "Balázs Fülei"): Balázs Fülei is living an active musical life as a concert pianist, he gave several concerts almost in every country in Europe, in China, Japan, Australia and in the United States.
Relevant evidence: No