Assertion: radon | /r/HasProperty | formed
Facets:
value: from natural uranium in the ground
type: LOCATION
value: from the rocks
type: OTHER
value: from the soil
type: OTHER
value: from the radioactive decay of uranium
type: CAUSE
value: naturally
type: MANNER
Source sentences:
text: Radon is a radioactive, extremely toxic gas that is formed naturally from the decay of uranium or thorium in rocks and soil.
text: It is formed from the radioactive decay of uranium.
text: The radioactivity is formed from the soil and the rocks in which it is found.
text: Radon is formed from natural uranium in the ground and in rocks and can accumulate in buildings.
text: It is formed from the decay of radium in soil, rock and water and can be found all over the United States and the world.