<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/10/54f5fea548a99_-_01-wdy-mind-sharp-puzzle-lgn.jpg>
<http://www.womansday.com/health-fitness/wellness/advice/g1288/improve-memory/>