Assertion: castle's keep | /r/HasProperty | the most common form of castle
Facets:
value: in the early 11th century
type: TEMPORAL
value: everywhere except scandinavia
type: OTHER
Source sentences:
text: In the early 11th century, the motte and keep – an artificial mound surmounted by a palisade and tower – was the most common form of castle in Europe, everywhere except Scandinavia.