Assertion: pencil | /r/CapableOf | cut through early 20th century
Facets:
value: from that time
type: TEMPORAL
value: if not earlier
type: TEMPORAL
Source sentences:
text: From that time, if not earlier, through the early 20th century, pencils cut from solid pieces of softer grades of slate or soap-stone were used by schoolchildren to write on tablets cut from harder grades of slate.