About: http://webisa.webdatacommons.org/187212185

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	So far, scientists have only been able to indirectly detect black holes by observing their effects on the orbits of nearby stars or by detecting the powerful radiation given off by gas and other material being pulled into the black hole.
http://www.w3.org/ns/prov#wasQuotedFrom	sciencedaily.com