Question: Andrei Okounkov and Moses Schönfinkel, were both mathematicians of which nationality?
Sentence (from "Moses Schönfinkel"): Moses Ilyich Schönfinkel, also known as Moisei Isai'evich Sheinfinkel' (Russian: Моисей Исаевич Шейнфинкель; 4 September 1889–1942), was a Russian logician and mathematician, known for the invention of combinatory logic.
Relevant evidence: Yes