<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/74251000/jpg/_74251270_c0025927-european_starling_flock-spl.jpg>
<http://www.bbc.co.uk/news/blogs-magazine-monitor-27037579>