premise: Ahmad Jovdat Ismayil oglu Hajiyev (June 18, 1917 - January 18, 2002) was one of the major Azerbaijani composers of the Soviet period. He is remembered for his monumental orchestral works, having been the first Azerbaijani to compose a symphony (1936). He studied under Azerbaijan's Founder of Composed Music, Uzeyir Hajibeyov and under Russian composer Dmitri Shostakovich.
hypothesis: Uzeyir Hajibeyov was the first composer to compose a musical in Russia.
reason: It is not know according to the original statement if he is the first or not.