<http://schema.org/about>
"The house you don't need to render, plaster, paint or insulate. The house with the building material that you can grow on one hectare (2.5 acres) of land. The same building material you can process yourself with standard"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/sustainable-product-design/the-whole-hemp-house.html>