Complex sentence: The novel "Catch-22", which this play is based on, is set during the latter stages of the Second World War from 1943 onwards, is frequently cited as one of the great literary works of the Twentieth Century.
Split into simpler sentences: The novel "Catch-22", on which this play is based, is set during the latter stages of the Second World War from 1943 onwards. It is frequently cited as one of the great literary works of the Twentieth Century.