<http://schema.org/about>
" You can't give up your day job to start that organic farm that you have been dreaming about and you don't have any land for an organic vegetable garden--but you really want to give it all a try.  What to do?  The answer is easy: volunteer for a week or"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/volunteer-on-an-organic-farm.html>