Complex sentence: In March 1995, John Paul II appointed him to the post of Permanent Observer of the Holy See to the United Nations in Geneva from 1997, with the same role at the World Trade Organization.
Split into simpler sentences: In March 1995, John Paul II appointed him to the United Nations in Geneva. He held the post of Permanent Observer of Holy See to the United Nations in Geneva from 1997, with the same role at the World Trade Organization.