About: http://webisa.webdatacommons.org/6245944

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 once the first answer is provided the challenge is invalidated automatically, regardless of whether the answer is correct or not.
http://www.w3.org/ns/prov#wasQuotedFrom	davesexton.com