<http://schema.org/image>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54cb40b91a4cd_-_apollo11-0714-9mripo-de.jpg>
<http://www.popularmechanics.com/technology/a10889/pmam-moon-caves-could-protect-future-astronauts-2463691/>