Assertion: lead pencil's lead | /r/MadeOf | graphite
Facets:
value: often
type: TEMPORAL
Source sentences:
text: The lead, often made of graphite, is not bonded to the outer casing, and can be mechanically extended as its point is worn away as it is being used.
text: So it really shouldn't bother us that the "lead" in your pencil is made of graphite.
text: Mechanical pencil is a pencil that has a mechanism that extends solid pigment core called a lead which is made of graphite or a solid pigment.
text: The lead in pencils is actually made of graphite.