PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Even Halliburton, a sure proponent of hydraulic fracturing, reports that ???fracking consumes vast amounts of water ??? typically millions of gallons for every well drilled.??? In areas such as Texas, home to both thousands of fracking wells and extreme drought, water stress is a major concern.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wateronline.com