<http://schema.org/alternativeHeadline>
"The galaxy is located approximately 12 million light-years away from Earth with a supermassive black hole with a mass 100 million times heavier than the sun."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/galaxys-colorful-middle-illuminated-by-alma-telescope>