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 "Lev Leshchenko"): Lev Valerjanovich Leshchenko (Russian: Лев Валерианович Лещенко ; born 1 February 1942), is a Russian singer, who was best known for his rendition of "Den Pobedy" and the 1980 Summer Olympics closing ceremony theme song "Do svidanja, Moskva".
Relevant evidence: Yes