About: http://webisa.webdatacommons.org/84932550

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	Until now, scientists have observed only two types of black holes - ones that are about the same mass as stars, and ones that are a million or a billion times bigger than the mass of a star.
http://www.w3.org/ns/prov#wasQuotedFrom	bbc.co.uk