<http://schema.org/about>
"The image shows the Helix Nebula, which lies about 700 light-years from Earth in the constellation Aquarius (The Water Bearer). The picture was taken in infrare"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/helix-nebula-photo-looks-like-giant-golden-eye>