About: http://webisa.webdatacommons.org/9564190

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In FIG. 2, the reference numeral 18 designates a light source such as a light emitting diode which emits invisible infrared light to the observer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com