<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb2af4727d0_-_cruise-ship-01-0314-mdn.jpg>
<http://www.popularmechanics.com/adventure/outdoors/tips/a10126/this-is-how-to-prevent-cruise-ship-disasters-16552403/>