<http://schema.org/about>
"Is it possible to get mercury poisoning along with your omega 3s in fish oil? Here's the rundown on the risks and benefits of eating fish."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/questions/do-fish-oil-capsules-have-mercury-in-them>