PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The restrictions would apply to power plants?? and boilers?? emissions of ???heavy metals,??? including mercury, arsenic, chromium, and nickel, and acid gases, such as hydrogen chloride and hydrogen fluoride.
http://www.w3.org/ns/prov#wasQuotedFrom
  • manhattan-institute.org