About: http://webisa.webdatacommons.org/261663567

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 source was a Wikipedia article quoting a National Geographic publication Pinpointing the Past in Washington, D.C. which must have been in error.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com