Assertion: radon | /r/MadeOf | rock
Facets:
value: like granite
type: OTHER
value: like pitchblende
type: OTHER
value: like shale
type: OTHER
value: like phosphate rock
type: OTHER
Source sentences:
text: Radon has a variety of sources, including uranium, and contains rocks like granite, shale, phosphate rock, and pitchblende.