<http://schema.org/about>
"John Llewellyn was a chemist who in 1967 was selected to be a NASA astronaut but whose inability to pilot a jet led to him resigning."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/john-llewellyn-the-astronaut-who-never-flew-dies-at-80>