<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/10/29/131029154900_bulgarian_roma_woman_624x351_afp.jpg>
<http://www.bbc.com/mundo/blogs/2013/10/131029_blog_periodismo_arquitectura.shtml>