<http://schema.org/about>
"In the 1940s and 50s, when comic books surged in popularity, a great number of superheroes had origin stories rooted in the fear of nuclear power gone wrong. Whether via spider bite, cosmic storm, or experiment gone"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/10-nuclear-powered-superheroes-and-supervillains-video-slideshow.html>