About: http://webisa.webdatacommons.org/243738651

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	use as visual signs or signalling devices or as means of viewing photographic or other visual images, such as signal flags or motion-picture projectors;
http://www.w3.org/ns/prov#wasQuotedFrom	historymuseum.ca