<http://schema.org/about>
"Between the eighth and 10th centuries, Vikings were exploring and spreading into Greenland, Iceland and Newfoundland. Now, a new study finds that these notoriou"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/stories/viking-explorers-brought-mice-stowaways-with-them>