<http://schema.org/alternativeHeadline>
"While tornado-related deaths have declined dramatically over the past few decades, the massive outbreak on April 27 killed nearly 300 people across the Deep South. Here's why."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/climate-weather/stories/why-were-the-southern-tornadoes-so-deadly>