Assertion: fortress's wall | /r/HasProperty | sunk into ditch
Facets:
Source sentences:
text: Walls exposed to direct cannon fire were very vulnerable, so the walls were sunk into ditches fronted by earth slopes to improve protection.
text: Walls exposed to direct cannon fire were very vulnerable, so were sunk into ditches fronted by earth slopes.
text: Walls exposed to direct cannon fire were very vulnerable, so were sunk into ditches fronted by earth slopes.
text: Walls exposed to direct cannon fire were very vulnerable, so were sunk into ditches fronted by earth slopes.