<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x400/54cb43fe11de9_-_mars2020-0714-de.jpg>
<http://www.popularmechanics.com/space/moon-mars/a11015/sneak-peek-mars-2020-mission-17044936/>