<http://schema.org/url>
<http://www.businessweek.com/articles/2013-09-06/think-planes-are-crowded-theres-room-for-things-to-get-worse>
<http://www.bloomberg.com/bw/articles/2013-09-06/think-planes-are-crowded-theres-room-for-things-to-get-worse>