Question: The March 1956 demonstrations (also known as the 1956 Tbilisi riots or 9 March massacre) in the Georgian SSR were a series of protests against Nikita Khrushchev's de-Stalinization policy, Khrushchev was a Soviet politician who led the Soviet Union during part of the Cold War as the First Secretary of the Communist Party of the Soviet Union from 1953 to 1964, and as Chairman of the Council of Ministers, or Premier, from which years time span?
Sentence (from "Nikita Khrushchev"): Khrushchev was responsible for the de-Stalinization of the Soviet Union, for backing the progress of the early Soviet space program, and for several relatively liberal reforms in areas of domestic policy.
Relevant evidence: No