Complex sentence: Orwell's list was a list of notable writers and other individuals that was prepared in 1949, shortly before he died, by the English author George Orwell because he considered them to be unsuitable as possible writers for the Information Research Department's anti-communist propaganda activities.
Split into simpler sentences: Orwell's list was a list of notable writers and other individuals that was prepared in 1949, shortly before he died, by the English author George Orwell. It comprised names of people he considered to be unsuitable as possible writers for the Information Research Department's anti-communist propaganda activities.