<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54cab659dcc5a_-_robot_movement_05_1210-xl-32936601.jpg>
<http://www.popularmechanics.com/technology/robots/g420/best-movement-in-robotics/>