<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://edc.h-cdn.co/assets/cm/15/04/54c197aecb2b2_-_00n0n_ia7pzbax5fm_600x450-mdn.jpg>
<http://www.elledecor.com/shopping/furniture/advice/a6143/lifecycle-of-a-futon/>