<http://schema.org/url>
<http://www.businessweek.com/articles/2012-10-25/airbnb-coursera-and-uber-the-rise-of-the-disruption-economy>
<http://www.bloomberg.com/bw/articles/2012-10-25/airbnb-coursera-and-uber-the-rise-of-the-disruption-economy>