Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Neolithic Flint Mines at Spiennes (Mons)' has mentioned 'Millennium' in the following places:

Occurrence Sentence	Text Source
In the Neolithic period, (from the last third of the 5th millennium until the first half of the 3rd millennium), the site was the centre of intensive flint mining present underground.	UNESCO