<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://edc.h-cdn.co/assets/cm/15/04/640x976/54c1b1be5f54c_-_edc050114edgoesto17-xln.jpg>
<http://www.elledecor.com/life-culture/travel/g872/guide-to-porto/>