<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/640x430/54eba06bd865d_-_11-head-of-iceberg-lettuce-xl.jpg>
<http://www.womansday.com/health-fitness/nutrition/advice/g774/bad-foods-good-for-you/?src=shelter_footer>