Assertion: natural graphite | /r/ObjectUse | used as lubricant
Facets:
value: mostly
type: DEGREE
Source sentences:
text: Natural graphite is found in underground deposits, it is mined and it is primarily used as a lubricant and as pencil lead.
text: Natural graphite is mostly used for refractories, batteries, steelmaking, expanded graphite, brake linings, foundry facings and lubricants.