About: http://webisa.webdatacommons.org/395068716

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 explosion of these stars a few million years later creates thousands of supernova remnants???bubbles of multimillion degree Celsius gas enriched with oxygen, iron and other heavy elements.
http://www.w3.org/ns/prov#wasQuotedFrom	harvard.edu