<http://schema.org/about>
"In a sign of things that might have been, Chinese children born after the closure of a local coal plant have found themselves with 60% less development problems such as motor skill coordination than those born prior to the closing."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/huge-drop-in-chinese-birth-defects-after-local-coal-plant-closes.html>