Assertion: carbon | /r/ObjectUse | used as fuel
Facets:
value: for heating
type: PURPOSE
value: most notably
type: DEGREE
Source sentences:
text: Most notably, it is used as a fuel (coal or charcoal), while graphite is used in electrodes, dry cells and pencil tips and as a lubricant.
text: Carbon in the form of coal is used as a fuel for heating and for the production of mechanical energy for manufacturing, transportation and the generation of electicity;