<http://schema.org/about>
"\nPhoto: Wikipedia, CC\nPay to Play\nStockholm, Sweden, has had a congestion charge since January 2006. Cars that enter the city center must pay a congestion tax which varies depending on the time of day (from nothing at night to 20 SEK during rush hour)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/congestion-charge-cuts-waiting-time-50-and-co2-by-18-in-stockholm.html>