About: http://webisa.webdatacommons.org/89763187

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	Many of those works are out of copyright, are were scanned in by Google Books themselves, rather than a third party, such as a publisher.
http://www.w3.org/ns/prov#wasQuotedFrom	werelate.org