About: http://webisa.webdatacommons.org/216813457

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	This includes all signal flags, halyards, flag bags, blinker tubes, signal searchlights, spare bulbs, semaphore flags, recording boards, paper and pencils for recording, and any other equipment or material pertaining to signalling.
http://www.w3.org/ns/prov#wasQuotedFrom	ibiblio.org