<http://schema.org/about>
"Bike helmets are as much of a pain when they are not on your head as when they are- what do you do with it? Most people use U-locks, and if the helmet designers gave a moment's thought to the issue, they could adjust the hole pattern so that you could"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/bikes/the-helmet-lock-never-carry-your-helmet-around-again.html>