About: http://webisa.webdatacommons.org/455655779

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	of light is a constant for all observers ??? we can not view photons in the same way as tennis balls!
http://www.w3.org/ns/prov#wasQuotedFrom	osti.gov