<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/480x552/54ff06c19eaba-ghk-try-swimming-on-bosu-7-xln.jpg>
<http://www.goodhousekeeping.com/health/fitness/g596/dangerous-exercises/?src=shelter_footer>