About: http://webisa.webdatacommons.org/421387039

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	E.g.: I only want to check a forum for new threads, which can be done anonymously; but if logged in, new posts here variable will be reset by SiteDelta's visit, so doing it on a schedule is a bad idea.
http://www.w3.org/ns/prov#wasQuotedFrom	mozilla.org