<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x430/54cab658c67c2_-_robot_movement_03_1210-xl-43596383.jpg>
<http://www.popularmechanics.com/technology/robots/g420/best-movement-in-robotics/>