Question: What years was this campaign of political repression in the Soviet Union occurring, during which Yakov Ganetsky was executed?
Sentence (from "Great Purge"): In Russian historiography, the period of the most intense purge, 1937–1938, is called Yezhovshchina (Russian: Ежовщина ; literally, "Yezhov phenomenon", commonly translated as "times of Yezhov" or "doings of Yezhov"), after Nikolai Yezhov, the head of the Soviet secret police, the NKVD, who was later killed in the purge.
Relevant evidence: No