BGS Linked Open Data

http://data.bgs.ac.uk/id/Geochronology/Rank/ERA

http://www.w3.org/2004/02/skos/core#altLabel ['Erathem']
http://www.w3.org/2004/02/skos/core#definition ['A sub-division of an Eon. Typically measured in tens of millions years.']