Assertion: radon | /r/HasProperty | present on earth
Facets:
value: into the future
type: TEMPORAL
Source sentences:
text: However, since thorium and uranium are two of the most common radioactive elements on Earth, and they have three isotopes with very long half-lives, on the order of several billions of years, radon will be present on Earth long into the future in spite of its short half-life as it is continually being generated.