Assertion: manganese | /r/AtLocation | combination
Facets:
value: in many minerals
type: LOCATION
value: with iron
type: OTHER
value: often
type: TEMPORAL
Source sentences:
text: Manganese does not occur naturally as a free element, but is often found in combination with iron and in many minerals.
text: Manganese is a chemical element, found in combination with iron and in other minerals.