Complex sentence: A spring of water located in Ogof Llech, a cave on the headland very difficult of access, and claimed to have been used as a hermitage by Saint Tudno a sixth century monk of Bangor-is-y-Coed who established the first church here.
Split into simpler sentences: A spring of water located in Ogof Llech, a cave on the headland which is very difficult to access. It is claimed to have been used as a hermitage by Saint Tudno, a sixth century monk of Bangor-is-y-Coed who established the first church here.