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"Tornadoes are some of the most dangerous storms on the planet. But there are many things you can do to prepare so that you and your are safe in the event of a terrible twister. Test your knowledge of this weather event process with our 20-question quiz."^^<http://www.w3.org/2001/XMLSchema#string>
<http://home.howstuffworks.com/home-improvement/household-hints-tips/cleaning-organizing/tornado-preparation-quiz13.htm>