<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x1306/54ff589d95ac8-ghk-celebrity-heart-problems-david-letterman-s2.jpg>
<http://www.goodhousekeeping.com/health/g1205/a-list-heart-health-survivors/>