About: http://webisa.webdatacommons.org/73318063

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	Ordinary light is not very good for sending signals long distances, especially in fog or a storm (which is when it is most needed).
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.be