Assertion: black hole's galaxy | /r/HasProperty | nearby
Facets:
Source sentences:
text: In 2011, scientists discovered the largest black holes known in two nearby galaxies.
text: A network of telescopes captured four images of a "supermassive" black hole that is 6.5 billion times larger than our sun and located in a nearby galaxy called Messier 87, known as M87 for short.