<http://schema.org/about>
"To any environmentalist, to say that sharks are worth more alive than dead is stating the obvious. But researchers have made that a quantifiable statement, showing that each individual reef shark contributes as much as $2"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/million-dollar-reef-sharks-more-valuable-alive-than-dead.html>