Assertion: manganese | /r/AtLocation | soil
Facets:
value: naturally
type: MANNER
Source sentences:
text: Manganese is a trace element that occurs naturally in soil, water, and plants, and we need a small amount of it in our diet – but not too much.
text: Hard, brittle, and gray–white in color, manganese is a component of various types of rock and occurs naturally in our air, soil, and water.
text: Manganese is a mineral that naturally occurs in rocks and soil and may also be present as a result of underground pollution sources.