About: http://webisa.webdatacommons.org/370012171

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	It allows users to post content, such as text or images, and it aggregates additional content from external sources, including various Web services and social networking sites.
http://www.w3.org/ns/prov#wasQuotedFrom	arstechnica.com