<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54cac0d178c83_-_digital_antenna_0311-de.jpg>
<http://www.popularmechanics.com/culture/tv/how-to/a6608/build-your-own-digital-tv-antenna/>