<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/55013000/jpg/_55013480_alexandrecarvalhoatthepicnicagainstprecariousnessinlisbonpark.jpg>
<http://www.bbc.co.uk/news/world-14716410>