<http://schema.org/about>
"In the center of Centaurus A is a supermassive black hole -- believed to be 100 million times more massive that our sun -- which is responsible for the galaxy's"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/photo-massive-black-hole-galaxy-spews-powerful-radio-waves>