<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/cpsprodpb/D920/production/_88948555_paris_brussels_connections_in_depth_624_v5.jpg>
<http://www.bbc.com/news/world-europe-35903368>