<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f64241a9ded_-_salami-cream-cheese-sandwich-recipe-mslo0710-xl.jpg>
<http://www.delish.com/entertaining/g170/picnic-sandwiches/>