PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, there is a lack of data because until now only very few drilling expeditions could be carried out in these hostile regions.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org