PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • What has been needed in the industry is a method, material, or procedure that will act to limit or eliminate flowback of particulate materials placed into the formation in a fracturing process.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com