Complex sentence: Originally from Novosibirsk, Siberia, Shamir says he moved to Israel in 1969, serving in the 1973 war, after which he took up journalism and writing.
Split into simpler sentences: Originally from Novosibirsk, Siberia, Shamir says he moved to Israel in 1969. He says that he served in the 1973 war, after which he took up journalism and writing.