<http://schema.org/caption>
"Taken on May 24, 1973, this photo was the first footage taken using the NSSL doppler radar and NSSL chase personnel. This tornado was in its early stage of formation in Union City, Oklahoma."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.4029tv.com/article/majestic-monsters-tornadoes-captured-over-the-years/4913336>