About: http://webisa.webdatacommons.org/376226707

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	They also offer a free toned down version called PostBox Express, that is missing some of their best features such as file, image, and URL search.
http://www.w3.org/ns/prov#wasQuotedFrom	mozillazine.org