PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The irony of this is that Russia itself has been engaged in fracking for several years in Western Siberia and is now using technology acquired from Western companies such as BP to increase the use of vertical and horizontal drilling to extract gas from shale deposits.
http://www.w3.org/ns/prov#wasQuotedFrom
  • radioviceonline.com