<http://schema.org/thumbnail>
"http://cdn-s3.si.com/s3fs-public/videos/video_still_596-2859678290001.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/sports-illustrated/video/2013/11/22/si-now-live-friday-november-22-2013>