Assertion: slate | /r/HasProperty | tough
Facets:
value: extremely
type: DEGREE
value: without being brittle
type: OTHER
Source sentences:
text: Yet, on the other hand, it is also extremely tough, so it works as a covering for homes and other structures.
text: Some slates are hard and tough without being brittle.
text: Slate quarried for roofing is dense, sound rock, and is exceedingly tough and durable.