<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54caaa1f1ef1d_-_joule-lg.jpg>
<http://www.popularmechanics.com/home/how-to/a5966/how-induction-stoves-work-how-the-heat-happens/>