<http://schema.org/about>
"Sending astronauts to a deep-space outpost beyond the moon's far side could help lay the groundwork for more ambitious manned missions to Mars."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/nasa-outpost-beyond-moon-could-lead-to-mars>