<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54cb59341c435_-_normal-earbuds-1114-de.jpg>
<http://www.popularmechanics.com/technology/startups/a11644/new-york-city-startup-normal-3d-printed-earbuds-17392337/>