<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x383/54c8132f085f4_-_cev-mm-cm-xsectright2-lg.jpg>
<http://www.popularmechanics.com/space/a263/new-space-shuttle/>