<http://schema.org/thumbnail>
"http://yospace-cds1.reuters.com/u/resize~ad1~120x120/0/f/~image_jpeg~9999-1/1/m/v/i/w/s/2ye4/reuters04?videoId=78016588"^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2014/02/04/high-hopes-for-space-grown-stem-cells?videoId=276705815&videoChannel=4000>