Assertion: castle's wall | /r/HasProperty | erected in the 15th century bc
Facets:
value: at the site of ao
type: LOCATION
Source sentences:
text: In Shang Dynasty China, at the site of Ao, large walls were erected in the 15th century BC that had dimensions of 20 m (66 ft) in width at the base and enclosed an area of some 2,100 yards (1,900 m) squared.