<http://schema.org/about>
"An estimated 70 percent of all antibiotics used in the United States are regularly added to the feed of livestock and poultry that are not sick. The antibiotics are used to promote growth for the animals, but they also have negative effects on human"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/keep-antibiotics-working.html>