Original sentence: It is the second largest of the Ionian Islands, and lies off the coast of Sarandë, Albania, from which it is separated by straits varying in breadth from 3 to 23 km (2 to 15 mi), including one near ancient Butrint and a longer one west of Thesprotia
Edited sentence: It is the second largest of the Ionian Islands, and its northern part lies off the coast of Sarandë, Albania from which it is separated by straits varying in breadth from 3 to 23 km (2 to 15 mi), including one near ancient Butrint.The southern part of the island lies off the coast of Thesprotia, Greece