<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/16/26/640x320/landscape-1467310249-curiosity-web.jpg>
<http://www.popularmechanics.com/space/moon-mars/news/a21615/mars-new-a-kind-of-dune/>