<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://sev.h-cdn.co/assets/cm/15/07/54da91661563c_-_katy-perry-in-concert-irving-plaza-dk0409.jpg>
<http://www.seventeen.com/celebrity/a4405/katy-perry-hello-katy-tour/>