Assertion: mound | /r/HasProperty | built of stone
Facets:
Source sentences:
text: Until it was excavated in 1953, the mound was built of stone and measured 15 metres (49 ft) in diameter and 1.6 metres (5 ft 3 in) high, although its size may have grown since white settlement of the region, since locals are known to have added earth to the mound to resist erosion.