<http://schema.org/description>
"Mass hysteria epidemics are not as rare as you might think. They often occur in small, insular worlds like schools and factories where people feel stressed. We&amp;#039;ve got examples from the 16th century to the 21st."^^<http://www.w3.org/2001/XMLSchema#string>
<http://history.howstuffworks.com/historical-events/10-strangest-mass-hysterias3.htm>