<http://schema.org/about>
"It took the humans a little while to catch on to what this very smart crow was telling them when he swooped in for a sip of the water."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/blogs/smart-thirsty-crow-turns-to-humans-for-help>