<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/480x360/54cfd81a68690_-_hidden-rails-01-0514-de.jpg>
<http://www.popularmechanics.com/technology/design/g1520/9-creepy-and-cool-hidden-roads-and-rail-lines/>