PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These two systems use different types of focusing collectors - on the left one on a trough that makes the hot water, and on the right, those mirrors focus on what???s called a sterling engine that makes the power directly.
http://www.w3.org/ns/prov#wasQuotedFrom
  • resilience.org