<http://schema.org/about>
"In the impoverished Nairobi neighborhood of Kibera, often called \"Africa's biggest slum,\" the lack of toilets and sewer systems leaves hundreds of thousands of people"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/source-of-sanitation-crisis-becomes-sustainable-power-solution-in-africas-largest-slum.html>