Complex sentence: Iorwerth was formerly abbot of the Premonstratensian house of canons at Talyllychan, Iorwerth was elected to the vacant bishop's see of St Davids in 1215.
Split into simpler sentences: Iorwerth was formerly abbot of the Premonstratensian house of canons at Talyllychan. He was elected to the vacant bishop's see of St Davids in 1215.