About: http://webisa.webdatacommons.org/31893004

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	Because light and other forms of energy and matter are permanently trapped inside a black hole, it can never be observed directly.
http://www.w3.org/ns/prov#wasQuotedFrom	factmonster.com