<http://schema.org/topics>
"apps,Health &amp; Fitness,Gadgets,Health &amp; Fitness,Lifestyle,Mobile,POLAR,Uncategorized"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2012/10/19/polar-heart-rate-chest-strap-bluetooth/?WT.mc_id=en_fitness>