About: http://webisa.webdatacommons.org/172328149

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 Crab Nebula is a six-light-year-wide expanding remnant of a star???s supernova explosion.
http://www.w3.org/ns/prov#wasQuotedFrom	esa.int