Complex sentence: During World War II she was used as a troopship and after surviving the War, in 1947 she was refitted as a luxury liner with the new name "Empress of Canada" and returned to service on her original Canada to England route.
Split into simpler sentences: During World War II she was used as a troopship and survived the war. In 1947 she was refitted as a luxury liner with the new name "Empress of Canada" and returned to service on her original Canada to England route.