Assertion: flint | /r/ObjectUse | used as a building material
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: This tendency is enhanced by the impurities found in most samples of flint that may expand to a greater or lesser degree than the surrounding stone, and is similar to the tendency of glass to shatter when exposed to heat, and can become a drawback when flint is used as a building material.
text: Where flint is abundant it is sometimes used as a construction material.