About: http://webisa.webdatacommons.org/410092305

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	One consequence is that c is the speed at which all massless particles and waves, including light, must travel in vacuum.
http://www.w3.org/ns/prov#wasQuotedFrom	schools-wikipedia.org