<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://doz.h-cdn.co/assets/16/25/1466541533-1465416587-screen-shot-2016-06-08-at-40924-pm.png>
<http://www.drozthegoodlife.com/health-articles/health-conditions/a1850/inside-migraine-aura/>