Question: Olga Arefieva was the student of the singer who was best known for his rendition of what song?
Sentence (from "Olga Arefieva"): She graduated from Gnessin State Musical College (her teacher was Lev Leshchenko), founded band "Kovcheg" ("The Ark"), composed more than 400 songs, issued 15 music albums, and won the literary prize of the magazine "Znamya" for her poems.
Relevant evidence: Yes