<http://schema.org/about>
"Americans are changing their car-buying habits every month, as gas prices send up and down signals to the marketplace. The solution: A price floor for gasoline,"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/transportation/blogs/why-wildly-erratic-gas-prices-are-driving-everybody-crazy>