Question: Who completed Prokofiev's Cello Concertino with a Russian composer born in 1904?
Sentence (from "Dmitry Kabalevsky"): Dmitry Borisovich Kabalevsky (Russian: Дми́трий Бори́сович Кабале́вский ; 30 December [O.S. 17 December] 1904 14 February 1987) was a Russian composer.
Relevant evidence: Yes