<http://schema.org/description>
"The question about supervolcanoes, it turns out, isn&amp;#039;t whether one could destroy all life on Earth. It&amp;#039;s when will it do it again. Wait, what?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/nature/natural-disasters/single-volcanic-eruption-destroy-all-life.htm>