Assertion: brown rice's arsenic | /r/AtLocation | soil
Facets:
value: naturally
type: MANNER
Source sentences:
text: As we mentioned before, arsenic is a naturally occurring substance that is found in air, water, and soil.
text: Arsenic is a naturally occurring heavy metal found in soil, rock, and water.
text: Arsenic is naturally found in soil and water, and rice plants tend to absorb it more readily than other food crops.