About: http://webisa.webdatacommons.org/107051458

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	So it is one of those delightful rare things: an open question to which an answer just might possibly be found, particularly if you read German and have access to previously unpublished correspondence from the early twentieth century.
http://www.w3.org/ns/prov#wasQuotedFrom	unsw.edu.au