<http://schema.org/about>
"We recently reported that the endocrine disruptor Bisphenol A (BPA) was found in organic baby food packed in glass jars, apparently from the lining of the metal lid. (see"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/is-there-bisphenol-a-in-your-home-canning.html>