PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Rainwater harvesting is a time-tested and effective means of water conservation and irrigation, said Billy Kniffen, retired Texas A&M AgriLife Extension Service statewide water resource specialist and past director of the American Rainwater Catchment Association.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org