<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb323d5233e_-_megastrong-02-0414-de.jpg>
<http://www.popularmechanics.com/technology/a10394/the-new-3d-printed-construction-supermaterial-16718268/>