<http://schema.org/url>
<http://www.joystiq.com/2009/06/05/sony-considering-umd-game-trade-in-program-for-psp-go-digital-ve/>
<http://www.engadget.com/2009/06/05/sony-considering-umd-game-trade-in-program-for-psp-go-digital-ve/>