<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cad6d517128_-_china-docking-110411-bjgeez-mdn.jpg>
<http://www.popularmechanics.com/space/a7255/chinas-space-docking-what-does-it-mean/>