About: http://webisa.webdatacommons.org/422533889

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	The dotted line represents the Walks of the sentinels: each walk is extended in such manner as to cross and flank two others, that each sentinel may have two others to check him.
http://www.w3.org/ns/prov#wasQuotedFrom	libertyfund.org