Did Russian mathematician Yuri Manin or Efim Zelmanov win the Fields Medal of International Congress of Mathematicians in 1994?
Yuri Manin: Yuri Ivanovitch Manin (Russian: Ю́рий Ива́нович Ма́нин ; born 1937) is a Soviet/Russian/German mathematician, known for work in algebraic geometry and diophantine geometry, and many expository works ranging from mathematical logic to theoretical physics. Efim Zelmanov: Efim Isaakovich Zelmanov (Russian: Ефи́м Исаа́кович Зе́льманов ; born 7 September 1955 in Khabarovsk) is a Russian-American mathematician, known for his work on combinatorial problems in nonassociative algebra and group theory, including his solution of the restricted Burnside problem. Efim Zelmanov:  He was awarded a Fields Medal at the International Congress of Mathematicians in Zürich in 1994.
Efim Isaakovich Zelmanov