<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://cos.h-cdn.co/assets/cm/14/25/539fa23a5da86_-_cos-fun-date-ideas-14-lgn.jpg>
<http://www.cosmopolitan.com/sex-love/news/a10001/couples-friends-with-other-couples-are-happier-011812/>