<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/51/548f7b070aaf8_-_1405542784-standing_side_crunches_with_towel_-_core_moves.gif>
<http://www.redbookmag.com/body/health-fitness/news/a18296/ab-exercises-you-probably-havent-tried-cosmopolitan/>