<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/10/480x480/54f5fa4f5d537_-_01-woman-riding-bike-lgn.jpg>
<http://www.womansday.com/health-fitness/womens-health/advice/g1323/weird-side-effects/>