Assertion: selenium | /r/HasProperty | produced
Facets:
value: from copper
type: OTHER
value: in the refining of these ores
type: LOCATION
value: from iron
type: OTHER
value: during production
type: TEMPORAL
value: commercially
type: MANNER
Source sentences:
text: People working in or living near industries where selenium is produced, processed, or converted into commercial products may be exposed to higher levels of selenium in the air.
text: Commercially, selenium is produced as a byproduct in the refining of these ores, most often during production.
text: It is now produced primarily from copper, iron , and lead ores.