Claim: Lonely Accordion is a song whose text was written in a poem by Mikhail Isakovsky and composed by Boris Mokrousov that was performed by the Pyatnitsky Choir (but did not receive significant fame).
Evidence: Lonely Accordion (Russian: Одинокая гармонь) is a song by the composer Boris Mokrousov. The song is written in a poem by Mikhail Isakovsky. It was performed by the Pyatnitsky Choir, but did not receive significant fame.