<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://cos.h-cdn.co/assets/cm/14/25/53a0bd123924e_-_tumblr_mwklikblfz1smz78jo2_500.gif>
<http://www.cosmopolitan.com/health-fitness/news/a16591/how-to-get-your-core-in-shape/>