<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://www.bbc.com/mundo/ultimas_noticias/2013/01/130106_ultnot_huelga_medicos_mozambique_bd>
<http://www.bbc.com/mundo/ultimas_noticias/2013/01/130106_ultnot_huelga_medicos_mozambique_bd.shtml>