PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The report also cited research indicating that fracking ??? now used in 90% of US natural gas wells ??? had been linked to drinking-water contamination and property damage in Colorado, Ohio, Pennsylvania, Wyoming and other states.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ourfutureplanet.org