Question: Vladimir Galouzine is a Russian tenor, he has performed in such Russian operas, such as which opera in 3 acts (7 scenes), by Pyotr Ilyich Tchaikovsky, to a Russian libretto by the composer's brother Modest Tchaikovsky, based on a short story of the same name by Alexander Pushkin?
Sentence (from "Mavra"): Mavra is about 25 minutes long, and features two arias, a duet, and a quartet performed by its cast of four characters.
Relevant evidence: No