<http://schema.org/topics>
"Health &amp; Fitness,fitness tracker,Gadgets,Health &amp; Fitness,Lifestyle,Pew Internet &amp;amp; American Life Project,survey,Uncategorized,U.S."^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2013/01/27/people-track-health-stats/>