About: http://webisa.webdatacommons.org/313122750

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	The closest is Google Docs and if i remember well, the chance to upload all kinds of documents for free is just a few months old AND there is also no official OS integrating apps.
http://www.w3.org/ns/prov#wasQuotedFrom	winrumors.com