<http://schema.org/about>
"Artist Patterson Clark naturally 'harvests' areas plagued by weeds and uses the leaves, roots and stems of much-loathed plants to produce handcrafted art suppli"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/organic-farming-gardening/blogs/alien-weeds-weed-eradication-of-the-artistic-variety>