About: http://webisa.webdatacommons.org/161950488

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	Astronomers have detected about 20 celestial objects that they think might contain black holes, including the center of the Milky Way galaxy.
http://www.w3.org/ns/prov#wasQuotedFrom	stanford.edu