<http://schema.org/about>
"William Shotyk, a Canadian scientist working at the University of Heidelberg, studied 132 brands of bottled water stored for six months, and found significant levels of the toxic metal antimony had leached out of the PET bottles into the water. Levels"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-water/antimony-in-your-bottled-water.html>