Complex sentence: After the fall of the Derg regime, Princess Sara and her sons were allowed to travel abroad, and after a number of years living in London, the Duchess has now returned to live in Addis Ababa.
Split into simpler sentences: After the fall of the Derg regime, Princess Sara and her sons were allowed to travel abroad. And after a number of years living in London, the Duchess has now returned to live in Addis Ababa.