Assertion: castle's curtain wall | /r/HasProperty | fronted by ditch
Facets:
value: to make
type: PURPOSE
Source sentences:
text: In medieval designs of castle and town, the curtain walls were often built to a considerable height and were fronted by a ditch or moat to make assault difficult.
text: In medieval designs of castle and town, the curtain walls were often built to a considerable height and were fronted by a ditch or moat to make assault difficult.