About: http://webisa.webdatacommons.org/48939187

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	I suspect that you audience---in your hypothetical this would be webadmins who know php and programmers who know how to configure web scripting engines---will mostly have a presence on both sites.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com