<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54fe9e7d4d720-heart-health-stethoscope-0210-th.jpg>
<http://www.goodhousekeeping.com/health/advice/a18654/healthy-heart-tips/?src=shelter_footer>