Original sentence: The last known metropolitan responsible for both Mosul and Erbil was ios, who was appointed by Eliya III (1175–89).The provinces of Mosul and Erbil, which had been governed by a single bishop since the middle of the seventh century, were re-divided around 1200
Edited sentence: Erbil, the chief town of Adiabene, lost much of its former importance with the growth of the city of Mosul, and in the middle of the seventh century the ecclesiastical provinces of Adiabene and Athor (Assyria) were placed under a single metropolitan.The last known metropolitan of Mosul and Erbil was ios, who was appointed by Eliya III (1175–89).The two provinces were governed by a 'metropolitan of Mosul and Erbil' for the next four and a half centuries, but were re-divided around 1200