<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f6423f0e0d8_-_turkey-caprese-sandwich-recipe-mslo0712-xwxjjt-de.jpg>
<http://www.delish.com/entertaining/g170/picnic-sandwiches/>