Claim: Valery Zhelobinski had a large output for his short career, composing four well-received operas, six symphonies, which refer to music composed for orchestras, and three piano concertos.
Evidence: Valery Viktorovich Zhelobinsky (Russian: Bалерий Bикторович Желобинский; sometimes transcribed from the Cyrillic as 'Zhelobinski' or 'Valarie Jelobinsky'; Tambov, 27 January 1913 – Leningrad, 13 August 1946) was a Russian composer and pianist. For his short career, Zhelobinsky's output was large. His four operas, which include The Peasant of Komarino (Комаринский мужик), produced in Leningrad in 1933, and Mother (Мать, 1939, based on the novel by Maxim Gorky), were well received. He also wrote orchestral music including six symphonies, and three piano concertos. A symphony is an extended piece of music for orchestra, especially one in sonata form.