<http://schema.org/about>
"Last month the U.S. Department of Energy launched its 'eGallon' online tool that allows you to see what the amount of electricity necessary to drive an average electric car as far as a gallon of gasoline would cost where you live."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/cars/plug-sales-way-ahead-where-hybrid-sales-were-30-months-after-introduction.html>