About: http://webisa.webdatacommons.org/290780735

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	database including patents and grants from the crown and commonwealth from 1623 to 1992 and database of grants in the Northern Neck Proprietary from 1692 to 1862 (images available online).
http://www.w3.org/ns/prov#wasQuotedFrom	virginiamemory.com