<http://schema.org/about>
"Rapid urbanization and widespread habitat destruction stemming from human activities are negatively impacting wildlife populations as never before. City-dwelling birds, which are an integral part of urban ecologies, are no"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/spontaneous-city-of-birdhouses-springs-up-in-london.html>