Assertion: pencil | /r/MadeOf | lead
Facets:
Source sentences:
text: If you’ve ever wondered what material is used in pencil lead, why graphite is called lead, or if pencils ever contained lead, we’ve got you!
text: There is no risk of lead poisoning if you stab yourself (or someone else) with a pencil because it contains no lead — just a mixture of clay and graphite.