PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Electromagnetic waves move (radiate) through space at the speed of light via interaction between their electric and magnetic fields and can penetrate solid objects such as cars and buildings. [72] Cordless phones, television, radio, and Wi-Fi also use RF radiation to transmit their signals. (Click to enlarge image)
http://www.w3.org/ns/prov#wasQuotedFrom
  • procon.org