Complex sentence: The prebend of Dunston, land amounting to perhaps 50 acres, supported one of the canons of St. Michael's, who was responsible for the cure of souls in the village.
Split into simpler sentences: The prebend of Dunston, land amounting to perhaps 50 acres, supported one of the canons of St. Michael's. The prebendaries of Dunston were responsible for the cure of souls in the village.