Assertion: artillery's gun | /r/HasProperty | insufficient
Facets:
value: along a 12,000 yard front
type: LOCATION
value: for a true creeping barrage
type: PURPOSE
Source sentences:
text: Along a 12,000 yard front, 456 guns were considered insufficient for a true creeping barrage (at Neuve Chapelle there had been one gun for every four yards of front).