<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cad0bb0008d_-_lightbulb_wars_slideshow_495x170_092011.jpg>
<http://www.popularmechanics.com/technology/gadgets/a7210/is-the-light-bulb-ban-a-bright-idea-6459591/>