About: http://webisa.webdatacommons.org/338402425

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	The quasar is a good background source for such an observation because it is expected
http://www.w3.org/ns/prov#wasQuotedFrom	stsci.edu