I undid your version because the sentence didnt make much sense to me in English   The French city of Avignon was part Western Schism between   during witch it was the see of one of the persons claiming to be pope  From what I understand the Western Schism ocurred after the papacy moved back to Rome so how could Avignon be part Western Schism between   Im assuming you meant part of the Western Schism  Also there were  popes during the Avignon papacy one of the persons is misleadingand was there someone else somewhere else who claimed to be pope during this time  If you clarify your message I would be happy to help you formulate it Regards