<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/548a3b1121766_-_sleep-positions-1011-1-msc.jpg>
<http://www.redbookmag.com/love-sex/relationships/advice/a12647/sleep-positions/>