<http://schema.org/about>
"Scientists have been investigating how to mimic spider silk for years. The seemingly delicate threads actually have a tensile strength five times greater than steel, and the possibilities for using a similar material in"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/researchers-create-artificial-spider-silk-spinner.html>