<http://schema.org/description>
"Ever wondered where that eerie music in old sci-fi movies comes from? It&amp;#039;s someone playing the theremin. This instrument is tough to master -- even though your fingers never have to touch a string or key. How&amp;#039;s that possible?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://electronics.howstuffworks.com/how-to-tech/how-to-play-theremin2.htm>