Assertion: granite | /r/HasProperty | difficult
Facets:
value: historically
type: TEMPORAL
value: extremely
type: DEGREE
value: to scratch it
type: PURPOSE
Source sentences:
text: Granite is one of the hardest materials in the world and, therefore, it is extremely difficult to scratch it, particularly darker colors which are extremely hard.
text: Its seaside location ensured that granite, a historically difficult commercial material, could be easily exported.