Assertion: black hole | /r/HasProperty | regions of spacetime
Facets:
Source sentences:
text: Black holes are regions of spacetime from which nothing, not even light, can escape.
text: A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
text: A black hole is a region of space time exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.