Assertion: emerald's source | /r/HasProperty | now-depleted deposits
Facets:
value: during neolithic times
type: TEMPORAL
Source sentences:
text: During Neolithic times, the key known sources of nephrite jade in China for utilitarian and ceremonial jade items were the now-depleted deposits in the Ningshao area in the Yangtze River Delta (Liangzhu culture 3400–2250 BC) and in an area of the Liaoning province and Inner Mongolia (Hongshan culture 4700–2200 BC).