Complex sentence: In 1984, he was reunited with his childhood diaries and the cherished letters his father wrote from prison in Kolyma, Siberia, from 1935-1952; these documents were smuggled out of Russia via Hungary and Austria by his friends.
Split into simpler sentences: In 1984, he was reunited with his childhood diaries and the cherished letters his father wrote from prison in Kolyma, Siberia, from 1935-1952. These documents were smuggled out of Russia via Hungary and Austria by his friends.