Assertion: keep's wall | /r/CapableOf | form fortified envelope
Facets:
value: around the keep
type: LOCATION
Source sentences:
text: The keep at Vincennes was highly innovative: six stories high, with a chemin de ronde running around the machicolated battlements; the luxuriously appointed building was protected by an enceinte wall that formed a "fortified envelope" around the keep.