Assertion: asteroid belt's asteroid | /r/HasProperty | recognized phenomenon
Facets:
value: newly
type: MANNER
Source sentences:
text: These so-called “active asteroids” are a newly recognized phenomenon, and as of this writing, only 13 known active asteroids have been found in the main asteroid belt, and so they are very rare.
text: These so-called “active asteroids” are a newly recognized phenomenon, and as of this writing, only 13 known active asteroids have been found in the main asteroid belt, and so they are very rare.