<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f6562d62374_-_angel-food-sheet-cake-recipe-mslo0913-xl-hju8aq-64342185.jpg>
<http://www.delish.com/cooking/g734/angel-vs-devil-food-cake/>