<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x368/54cb61cdc8eaa_-_ufo-baltic-sea-0212.jpg>
<http://www.popularmechanics.com/space/a12422/underwater-ufo-get-real-experts-say/>