PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The mixing is typically done by combining the cement ingredients, typically water, cement, and other non-aqueous materials until the proper density is obtained, and then continuing to mix as much material as needed at that density while pumping down hole in a continuous process.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com