<http://schema.org/about>
"It's solidly conventional wisdom that the United States is dependent on foreign oil. And this is one time where the facts do bear that out, with EIA data showing that in 2008 the United States imported 66% of its crude"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/16-countries-that-send-the-united-states-as-much-oil-as-nigeria.html>