Complex sentence: The Bishop of Bangor and Owain Gwynedd, prince of Gwynedd, give their assent, and the monks reach Gwytherin, a community stretching for several miles along the Cledwen River.
Split into simpler sentences: The Bishop of Bangor and Owain Gwynedd, prince of Gwynedd, give their assent. The monks reach Gwytherin, a community along the Cledwen River.