You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What years was this campaign of political repression in the Soviet Union occurring, during which Yakov Ganetsky was executed?" whose answer is 1936 to 1938.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Yakov Ganetsky executed Soviet political repression
Useful Output:

Doc 1: Soviet government; expelled from AUCP in 1933 and executed during Stalin's purges. Arthur Rudolfovich Siefeldt / Zifeldt (alias Simumyash)
Doc 2: (15 March 1879 — 26 November 1937) was a prominent Polish communist and close associate of Vladimir Lenin
Doc 3: Meeting the wishes of these countries to expand trade and economic contacts, Moscow, according to Yakov Ganetsky (Fuerstenberg), a member of the
Doc 4: They had to hand over everything to the Soviet state and starved to death – where after the State itself starved. A whole lot died of plague,
Doc 5: featured eulogies by Nikolai Bukharin, Kliment Voroshilov, and Yakov Ganetsky, as well as  The French Revolutionary Tradition in Russian and Soviet Politics,