About: http://webisa.webdatacommons.org/8396053

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	The date is a reference to Earth's last major asteroid impact, which flattened 800 square miles near Tunguska, Siberia on June 30, 1908.
http://www.w3.org/ns/prov#wasQuotedFrom	superseventies.com