<http://schema.org/about>
"It's been said that weeds are just plants whose virtues have not yet been discovered, but if you're tired of waiting to find out what those virtues are, you might want to use one of these homemade herbicides instead of the chemical versions."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/lawn-garden/homemade-herbicide-kill-weeds-without-killing-earth.html>