Original sentence: Active until the early 1960s, he was one of the most recognizable leaders of violent political repression.Alexandru Nicolschi (born Boris Grünberg, his chosen surname was often rendered as Nikolski or Nicolski; Russian: Александр Сергеевич Никольский, Alexandr Sergeyevich Nikolsky; June 2, 1915–April 16, 1992) was a Romanian communist activist, Soviet agent and officer, and Securitate chief under the Communist regime
Edited sentence: Active until the early 1960s, he was one of the leading perpetrators of violent political repression in Soviet-occupied Romania.Boris Grünberg (June 2, 1915–April 16, 1992), pseudonym Alexandru Nicolschi (also rendered as Nikolski or Nicolski; Russian: Александр Сергеевич Никольский, Alexandr Sergeyevich Nikolsky) was a communist activist, Soviet agent and NKVD officer, and Securitate chief under the Romanian Communist regime