Russian composer and secret police agent (1898–1974)
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Lev Konstantinovich Knipper (Лев Константинович Книппер) (3 December [O.S. 21 November] 1898 in Tbilisi – 30 July 1974 in Moscow), a Russian composer of partially German descent and an active OGPU - NKVD (Soviet secret police) agent. Lev Knipper was the nephew of the actress Olga Knipper (Anton Chekhov's wife). His older sister Olga Chekhova also became an actress and married Mikhail Chekhov. During the Russian civil war he fought in the White army and left Russia with the rest of baron Wrange
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).