<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/980x551/54ff11180f802-1-ghk-science-behind-happy-marriage-couple-telling-story-s2.jpg>
<http://www.goodhousekeeping.com/life/relationships/advice/g634/science-happy-marriage/>