<http://schema.org/about>
"The Antarctic ozone hole reached its biggest extent for the year on Sept. 26, 2013, the National Oceanic and Atmospheric Administration announced."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/what-you-dont-know-about-the-antarctic-ozone-hole>