Assertion: backgammon board | /r/HasProperty | same civilization
Facets:
Source sentences:
text: The second oldest backgammon board, about 5,000 years old, was discovered in 1926 by archaeologist Sir Charles Leonard Woolley in the digs of the Royal Tombs of Ur of the Chaldees, an ancient city of southern Mesopotamia built by the Sumerians, the same civilization credited for the invention of the wheel, the first written language and the first known math system.