<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/10/480x240/54f5f8e9bfea1_-_0-woman-lower-back-pain-lgn-64309129.jpg>
<http://www.womansday.com/health-fitness/workout-routines/advice/g765/exercises-for-back-pain/>