PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is the closest supermassive black hole known by far and hence is the best place to study black holes in detail.
http://www.w3.org/ns/prov#wasQuotedFrom
  • eurekalert.org