<http://schema.org/about>
"A system of hi-tech weather radars mapped the approximate tracks of the deadly tornadoes that struck overnight and early on Feb. 29 across the Midwest."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/tornado-tracks-where-the-midwestern-twisters-went>