Assertion: cork tree's bark | /r/HasProperty | stripped
Facets:
value: from the trees
type: LOCATION
Source sentences:
text: The bark is first stripped from the trees when they are about 20 years old, although the first quality cork is not produced for another 8 to 10 years.
text: Cork production is generally considered sustainable because the cork tree is not cut down to obtain cork; only the bark is stripped to harvest the cork.