PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Analysis of Soil Remediation Requirements at Abandoned Oil-Field Waste Disposal Sites in Louisiana, New Mexico, Oklahoma, and Texas Actvities related to oil production in Texas and other oil-producing states produce a variety of materials that have potential to harm the environment including oil, large volumes of salt water, and various chemicals (heavy metals?) used in drilling mud.
http://www.w3.org/ns/prov#wasQuotedFrom
  • utexas.edu