About: http://webisa.webdatacommons.org/198786293

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	My answer is a spoiler: the puzzle itself appeared on Sunday, Feb 9 2003.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com