Complex sentence: Pen-Y-Maes is the richer of the areas in Holywell in the NE side of the town (based on land prices), the old cottage hospital was located here until it closed.
Split into simpler sentences: Pen-Y-Maes is the richer of the areas in Holywell in the north east side of the town (based on land prices). The old cottage hospital was located here until it closed.