<http://schema.org/alternativeHeadline>
"Most of the time, nature is pretty good at following the 'one baby, one head' rule. But every now and then, something goes wrong and you get this."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/blogs/two-headed-baby-blue-shark-pulled-from-indian-ocean>