About: http://webisa.webdatacommons.org/158409135

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	If the document types are not valid, the user is warned via an error message at step 308 and provided with the option of re-uploading two valid documents at step 304.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk