Assertion: grenade | /r/CapableOf | prove useful a weapon
Facets:
value: left from artillery and bomb strikes
type: CAUSE
value: in such quarters
type: LOCATION
value: extremely
type: DEGREE
Source sentences:
text: Considering the nature of trench warfare of the time - and the thousands of craters left from artillery and bomb strikes - the grenade proved as extremely useful a weapon in such quarters.