<http://webisa.webdatacommons.org/422571610>	<http://www.w3.org/ns/prov#value>	"These Carvings Are the Oldest Rock Art in America, by Thousands of Years ??? ??????The true age of this rock art had not been known, but a new analysis suggests these petroglyphs are the oldest North America, dating back to between 10,500 and 14,800 years ago.??? The rocks occupy a spot in the Nevada desert once covered by Winnemucca Lake.???" .
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