Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Archaeological Ruins of Liangzhu City' has mentioned 'Prehistoric' in the following places:
Occurrence Sentence Text Source
The researchers also note that this is the only prehistoric culture known to work sapphire.
A 2007 analysis of the DNA recovered from human remains in archeological sites of prehistoric peoples along the Yangtze River shows high frequencies of Haplogroup O1 (Y-DNA) in the Liangzhu culture, linking them to the Austronesian and Tai-Kadai peoples.
It represents the great achievement of prehistoric rice-cultivating civilization of China over 5000 years ago, and as an outstanding example of early urban civilization.
The four component parts of the Archaeological Ruins of Liangzhu City include all the identified attributes necessary to convey its significance as an outstanding representation of a prehistoric early state and urban civilization in the Yangtze River Basin.