<http://schema.org/about>
"Aldrin's new book 'Mission to Mars: My Vision for Space Exploration' charts out a course that could put astronauts on the surface of Mars by 2035."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/buzz-aldrin-says-humanitys-future-is-on-mars>