<http://schema.org/about>
"A battered diamond that survived a trip from \"hell\" confirms a long-held theory: Earth's mantle holds an ocean's worth of water."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/earth-has-a-secret-reservoir-of-water-and-this-meteorite>