About: http://webisa.webdatacommons.org/216718650

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 thought that large comets and asteroids are a danger to the Earth was not widely accepted when Eugene Shoemaker first proposed the idea in 1960.
http://www.w3.org/ns/prov#wasQuotedFrom	pbs.org