<http://schema.org/alternativeHeadline>
"Scientists hope to answer this question: Why does modern plague, while deadly without antibiotics, pale in comparison to the devastation and wildfire-like spread of the Black Death?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/research-innovations/stories/black-death-genome-sequenced>