About: http://webisa.webdatacommons.org/319245186

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	Currently, there are around 400 blocks available for such Web services as Digg, Facebook, Flickr, Windows Live Spaces and YouTube, and more experienced developers can easily build their own.
http://www.w3.org/ns/prov#wasQuotedFrom	softwaredeveloper.com