<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x552/54cad9d7458dc_-_amnh-future-01-1111-xln-48692355.jpg>
<http://www.popularmechanics.com/space/moon-mars/g723/the-future-of-space-exploration-on-display-in-new-york-city/>