<http://schema.org/url>
<http://video.wired.com/watch/wired-live-bill-gates-president-bill-clinton-part-4-looking-forward-and-maintaining-optimism-exclusive-interview>
<http://video.wired.com/watch/wired-live-bill-gates-president-bill-clinton-part-4-looking-forward-and-maintaining-optimism-exclusive-interview>