Question: What was the nationality of the person who wrote Variations on a Theme by Tchaikovsky?
Sentence (from "Variations on a Theme by Tchaikovsky (Arensky)"): Variations on a Theme by Tchaikovsky, Op. 35a, a piece for string orchestra by Anton Arensky, started out as the slow movement of his String Quartet No. 2 in A minor, Op. 35, for the unusual scoring of violin, viola, and 2 cellos.
Relevant evidence: Yes