About: http://webisa.webdatacommons.org/40401621

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	Some are clearly not absolute -- we know, for example, that the speed of light is a variable, not a constant -- and others are simply not fully understood.
http://www.w3.org/ns/prov#wasQuotedFrom	retrievertraining.net