<http://schema.org/about>
"There's a terrible feeling you get when a bird smacks into a window, at the office or at your home. \"What was that?!\" You look outside, and see a dead or injured bird on the ground. Birds can't see glass, and windows on buildings"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/bird-friendly-glass-designed-with-help-from-spiders.html>