<http://schema.org/url>
<http://blogs.wsj.com/scene/2012/05/31/a-performance-artist-who-rewrites-history-one-step-and-tweet-at-a-time/>
<http://blogs.wsj.com/scene/2012/05/31/a-performance-artist-who-rewrites-history-one-step-and-tweet-at-a-time/>