<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/08/54ea911572ce6_-_11-bone-of-contention-2.jpg>
<http://www.womansday.com/life/a850/the-origins-of-12-common-idioms-83098/>