<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x551/54ff5ad0d6227-teens-jumping-in-pool-s2.jpg>
<http://www.goodhousekeeping.com/life/travel/tips/g1177/swimming-pool-safety-tips/>