<http://schema.org/about>
"About 900 species of plants and animals have gone extinct in the last five centuries, and more than 10,000 others are now on the verge of joining them as endang"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/stories/infographic-top-20-countries-with-most-endangered-species?page=2>