About: http://webisa.webdatacommons.org/144897226

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	Well, I think you need two different things, first of all you need a source of information, such source have to come in the GeoRSS standard or in the GeoJSON standard (I prefer the latter), here is an example:
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com