Original sentence: A prominent dissident writer [[Vladimir Voynovich], interviewd for Radio Freedom on the first anniversary of Solzhenitsyn' death, has stated  that Solzhenitshyn harbored antisemitic sentiment all his life, as attested by the 1964 manuscript he later developed into "200 Years Together", and that he deliberately consealed it, because he knew it would have prevented him from receiving the Nobel Prize
Edited sentence: A prominent dissident writer Vladimir Voynovich, interviewd for Radio Freedom on the first anniversary of Solzhenitsyn' death, has stated  that Solzhenitshyn harbored antisemitic sentiments all his life, as attested by the 1964 manuscript he later developed into "200 Years Together", and that he deliberately consealed them, because he knew this would have prevented him from receiving the Nobel Prize