Assertion: castle | /r/HasProperty | built across northern europe
Facets:
value: from the 10th century
type: TEMPORAL
Source sentences:
text: Relatively easy to build with unskilled labour, but still militarily formidable, these castles were built across northern Europe from the 10th century onwards, spreading from Normandy and Anjou in France, into the Holy Roman Empire in the 11th century.