PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As the 1980s progressed, everyone became more interested in environmental issues, and interest in solar began to rise again, with research mainly concentrated in Australia and the USA. Modern Solar Here in the UK, in 1992 we only had 172 gigawatts worth of solar cells installed.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sootoday.com