<http://schema.org/about>
"For electricity-free speakers, this design might be the most interesting. Artist and maker Christopher Locke used old broken trumpets and a few spare machine parts to build a sculpture that serves as both decoration and"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/hark-iphone-speakers-with-amazing-sound-made-from-broken-trumpets.html>