<http://schema.org/topics>
"biking,camera,features,Gadget of the Day Series,Gadgets,hd video,Mashable,POV camera,reviews,Sports,Tech,Video,Video camera"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/06/22/vio-pov-hd-camera-review/>