About: http://webisa.webdatacommons.org/267640584

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	(iii) Von Laue and Weyl's round-trip condition: The time needed by a light beam to traverse a closed path of length L is L/c, where L is the length of the path and c is a constant independent of the path.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org