Assertion: radon | /r/HasProperty | dangerous radioactive gas
Facets:
Source sentences:
text: Radon is a dangerous radioactive gas which can't be detected by humans, as it is invisible and has no smell or taste.
text: It may sound like something straight out of "Star Wars," but radon is actually a dangerous radioactive chemical that lurks far closer to home—in fact, it could be in your home right now.