<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>
<http://www.popularmechanics.com/military/navy-ships/a8513/where-are-americas-badly-needed-icebreakers-14829862/?src=rss>