Assertion: lead pencil's lead | /r/HasProperty | common metal
Facets:
value: in the earth's crust
type: LOCATION
value: fairly
type: DEGREE
value: for its high atomic number
type: CAUSE
Source sentences:
text: Lead is a common metal found naturally in the earth.
text: Lead is a fairly common element in the Earth's crust for its high atomic number (82).