<http://schema.org/url>
<http://www.joystiq.com/2012/05/31/dota-2-is-free-to-play-dota-store-open-now-and-selling-beta-a/>
<http://www.engadget.com/2012/05/31/dota-2-is-free-to-play-dota-store-open-now-and-selling-beta-a/>