PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The country???s shale-gas fields are also situated in mountainous regions, making drilling a challenge while increasing the cost of building roads, bridges, pipelines and other infrastructure.
http://www.w3.org/ns/prov#wasQuotedFrom
  • icis.com