<http://schema.org/about>
"From Petersburg to Novosibirsk, the former Soviet Union boasts some of the world's most unique and ambitious metro systems. Built at command-economy speed, these metros were the result of a political"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/cars/the-weird-beautiful-metros-of-the-soviet-union-a-slideshow.html>