Assertion: butte's mine | /r/HasProperty | deep
Facets:
value: very
type: DEGREE
Source sentences:
text: The first mines that were detonated tended to be reasonably small and not very deep, the trend then moved towards ever larger and deeper mines until on 14 May 1916 the Germans detonated 60 000 kilos of explosives under the western end of the ridge.