About: http://webisa.webdatacommons.org/307605428

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	They admit that the decision to leave them out was an error in judgement and each book should have had an index (same problem with Homesteading Space).
http://www.w3.org/ns/prov#wasQuotedFrom	collectspace.com