<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEzLzA2LzE5L2ZlL0RhY3R5bC40NDQxOS5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/5984195d/330/Dactyl.jpg>
<http://mashable.com/2013/06/19/nasa-grand-challenge-asteroid/>