<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb0c23e16e7_-_ea-mars-rover-01-0413-de.jpg>
<http://www.popularmechanics.com/technology/a8824/build-this-25-toy-mars-rover/>