<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/07/29/130729194538_papa_304x171_reuters.jpg>
<http://www.bbc.com/portuguese/noticias/2013/07/130722_papa_sinais_pai_lgb.shtml>