<http://schema.org/about>
"As you can see above, Chicago was relatively spared with only 900 meters of ice (0.55 miles), but Montr\u00E9al was deep under 3,300 meters (2.05 miles) of ice."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/climate-change/xkcd-webcomic-shows-how-thick-ice-was-over-north-american-cities-21000-years-ago.html>