About: http://webisa.webdatacommons.org/76499009

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 most practical cases, light and other electromagnetic waves can be thought of as moving instantaneously, but for long distances and very sensitive measurements their finite speed has noticeable effects.
http://www.w3.org/ns/prov#wasQuotedFrom	pearltrees.com