<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://rbk.h-cdn.co/assets/cm/14/50/640x360/548a90d7c0b47_-_rbk-how-to-be-friends-with-ex-set-boundaries-s2.jpg>
<http://www.redbookmag.com/life/advice/a15112/inbox-email-organization/>