Assertion: graphite | /r/HasProperty | mixed with clay
Facets:
value: to produce pencils
type: PURPOSE
Source sentences:
text: Even modern pencil ‘lead’ is composed of graphite mixed with clay.
text: They are made with graphite, which is also called black lead or plumbago, mixed with clay.
text: In 1795, the French artist Conte discovered that graphite could be mixed with clay to produce pencils with varying degrees of hardness.
text: Graphite drawing pencils are made with graphite mixed with clay.
text: When mixed with clay, graphite can be shaped into vessels or containers that are heat-resistant and durable.