<http://schema.org/about>
"By 2030, America could surpass Saudi Arabia in terms of crude output. That's great for energy independence, but it's not all good news."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/energy/blogs/us-to-become-the-worlds-biggest-oil-producer-but-hold-the-applause>