<http://schema.org/url>
<http://www.businessweek.com/articles/2012-03-05/behold-the-cheetah-robot-dot-the-singularity-is-nigh>
<http://www.bloomberg.com/bw/articles/2012-03-05/behold-the-cheetah-robot-dot-the-singularity-is-nigh>