GeoNames is a database of places that is also avaiable in RDF as part of the a linked data cloud.
Used in Chap. 17: page 274
Links:
geonames.org:
GeoNames
geonames.org:
GeoNames entry for Abereron
The GeoNames entry for Abereron as RDF downloaded from https://www.geonames.org/2657850/about.rdf