<http://schema.org/about>
"Under the light of a campfire, a Neanderthal used a stone tool to carefully etch what looks like a grid or a hashtag onto a natural platform of bedrock."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/lifestyle/arts-culture/stories/cave-carving-may-be-1st-example-of-neanderthal-art>