<http://schema.org/description>
"You wake up suddenly, gasping for air, coughing and wheezing. It could be paroxysmal nocturnal dyspnea. What causes it, and how can you treat it?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://health.howstuffworks.com/diseases-conditions/respiratory/paroxysmal-nocturnal-dyspnea2.htm>