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"This is photo #2 of the sequence showing the F5 Oklahoma City tornado that landed on May 3, 1999 after the F3 tornado. You can see it forming while the F3 is in circulation. This is known as a occluded mesocyclone tornado."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4029tv.com/article/majestic-monsters-tornadoes-captured-over-the-years/4913336>