<http://schema.org/about>
"It's almost inescapable, and while the FDA says BPA is safe at normal levels, a growing body of research has begun to suggest otherwise."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/translating-uncle-sam/stories/bpa-is-plastic-poisoning-our-food>