<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://cos.h-cdn.co/assets/cm/14/25/539fd7ff9fd35_-_cos-05-squat-yoga-ball-md.jpg>
<http://www.cosmopolitan.com/health-fitness/advice/g3001/workout-moves-for-better-sex/>