About: http://webisa.webdatacommons.org/181294380

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 biggest challenge is usually getting access to the data since there???s often no API. I agree that a major hurdle is getting sites to provide content in some XML format.
http://www.w3.org/ns/prov#wasQuotedFrom	oreilly.com