About: http://webisa.webdatacommons.org/181912979

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	More than 20,000 people, including Polish military personnel and civilians perished in the Katyn Slaughter.
http://www.w3.org/ns/prov#wasQuotedFrom	desertwar.net