Assertion: birch's bark | /r/CapableOf | get thick
Facets:
value: very
type: DEGREE
value: in this species
type: OTHER
Source sentences:
text: In the cork oak (Quercus suber) the bark is thick enough to be harvested as a cork product without killing the tree; in this species the bark may get very thick (e.g. more than 20 cm has been reported).