About: http://webisa.webdatacommons.org/410678774

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	As a consequence, in such a case or other similar challenge, it is better to return a new challenge (a new CAPTCHA for instance) rather than cancelling the negotiation, doing so eventually only after a few retries.
http://www.w3.org/ns/prov#wasQuotedFrom	xmpp.org