PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In 1954 RCA researched a small atomic battery for small radio receivers and hearing aids.[3] Since RCA's initial research and development in the early 1950s, many types and methods have been designed to extract electrical energy from nuclear sources.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org