Assertion: walnut's wood | /r/HasProperty | hard
Facets:
value: with an interlocking grain
type: OTHER
value: naturally
type: DEGREE
Source sentences:
text: Another commonality is the use of the wood, which is naturally hard and rot-resistant.
text: Wood of oak is very strong and hard.
text: However, the wood is heavy and hard with an interlocking grain, but is difficult to season.