<http://schema.org/url>
<http://www.businessweek.com/technology/how-to-get-into-ted-its-like-applying-to-collegeagain-and-again-02262012.html>
<http://www.bloomberg.com/bw/articles/2012-02-27/how-to-get-into-ted-its-like-applying-to-college-again-and-again>