About: http://webisa.webdatacommons.org/450472918

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	and requiring the production of books, papers, records or other tangible objects
http://www.w3.org/ns/prov#wasQuotedFrom	ipsn.org