Question: Olga Arefieva was a student of a Russian singer, who was best known for his rendition of what song that was the closing ceremony theme song of the 1980 Summer Olympics?
Sentence (from "Olga Arefieva"): Olga Arefieva (Arefeva) (born 21 September 1967 in Verkhnyaya Salda) is a Russian singer-songwriter, poet and musician.
Relevant evidence: No