<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/640x468/placeholder_548f7b0a20955_-_1405548178-butterfly_crunch_with_leg_lift.gif>
<http://www.redbookmag.com/body/health-fitness/news/a18296/ab-exercises-you-probably-havent-tried-cosmopolitan/>