PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It became clear that there were intervening factors such as increasing costs of exploration and development, escalating consumption in producer countries as well as the BRICs and elsewhere, and a threatened bottleneck in production capacity imposed by the aging of fossil-fuel producers??? workforces as well as the extremely complex and costly infrastructure they require for their operations.
http://www.w3.org/ns/prov#wasQuotedFrom
  • japanfocus.org