<http://schema.org/about>
"\"Brent North Sea crude for July delivery rose 42 cents to 69.84 dollars in electronic trading...On Monday, New York's main oil futures contract, light sweet crude for delivery in June, gained 21 cents to 65.15 dollars a barrel in electronic deals"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/attacks-in-oil-fields-drive-crude-oil-toward-us70-per-barrel.html>