<http://schema.org/about>
"One of the most sought after incentives for green(er) cars in California are the white, green and yellow stickers that give access to the HOV lane even if you don't have the required number of passengers. But when will they expire?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/cars/bill-ab-266-could-extend-hov-access-green-cars-10-years-california.html>