Complex sentence: Therefore, in 1926 Nikolsky was transferred to the INO INOstranny Otdiel ("Foreign Department"), the branch of the OGPU responsible for overseas intelligence operations, now headed by Artuzov, and sent to Paris under a legal cover of a Soviet Trade Delegation official.
Split into simpler sentences: Therefore, in 1926, he was transferred to the INO INOstranny Otdiel ("Foreign Department"), the branch of the OGPU responsible for overseas intelligence operations, now headed by Artuzov. He was sent to Paris under a legal cover of a Soviet Trade Delegation official.