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In page Great Purge:

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Romain Rolland and others wrote to Stalin seeking clemency for Bukharin, but all the leading defendants were executed except Rakovsky and two others (who were killed in NKVD prisoner massacres in 1941). Despite the promise to spare his family, Bukharin's wife, Anna Larina, was sent to a labor camp, but she survived to see her husband posthumously rehabilitated a half-century later by the Soviet state under Mikhail Gorbachev in 1988.[citation needed]