[Greek Prime Minister Alexis Tsipras (R) and Bartholomew I of Constantinople (L), Archbishop of Constantinople and Ecumenical Patriarch, greet Pope Francis upon his arrival on the Greek island of Lesbos on April 16, 2016]Pope Francis wants to take back to the Vatican a number of refugees after his landmark visit Saturday to the island of Lesbos, an official of Greece's state refugee coordination agency said.