<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/07/09/130709103411_bbc_food_fast_risks_304x171_bbc_nocredit.jpg>
<http://www.bbc.com/portuguese/noticias/2013/07/130711_cinco_conselhos_viver_mais_fn.shtml>