<http://schema.org/about>
"Shirts designed by NYU grad students Sue Ngo and Nien Lam feature internal organs that change colors depending on the levels of carbon monoxide in the atmospher"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/research-innovations/videos/color-changing-shirts-sniff-out-air-pollution>