Assertion: trench | /r/HasProperty | dug for military defensive purposes
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Trenches have also often been dug for military defensive purposes.
text: Trenches have also often been dug for military defensive purposes.
text: Trenches have also often been dug for military defensive purposes.
text: Trenches have often been dug for military defensive purposes.