<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/54eabe9feed3d_-_smart-ways-to-stop-worrying-mdn.jpg>
<http://www.womansday.com/health-fitness/wellness/advice/a1504/smart-ways-to-stop-worrying-106351/>