Assertion: quasar | /r/HasProperty | the heart of a galaxy
Facets:
Source sentences:
text: A quasar is the heart of a galaxy, consisting of a supermassive black hole.
text: A quasar is the heart of a galaxy, consisting of a supermassive black hole.
text: A quasar is the heart of a galaxy, consisting of a supermassive black hole.