<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb2c31021cf_-_firefighting-02-0314-de.jpg>
<http://www.popularmechanics.com/technology/gear/reviews/g1442/a-brief-history-of-firefighting/>