<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54caf18200bc8_-_snorkeling-gear-07-0812-lgn.jpg>
<http://www.popularmechanics.com/adventure/sports/g899/gear-up-the-best-snorkeling-tech/>