<http://schema.org/about>
"Since 1973, the Endangered Species Act has shaped not only conservation in the United States, but the entire country's environmental policy. By calling on agencies to enlist help from the public and scientists,"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/putting-the-endangered-species-act-into-practice-one-wolf-listing-at-a-time.html>