<http://schema.org/topics>
"amex,Business,credit cards,digital payment,mastercard,Mobile,Travel,Travel &amp; Leisure,Uncategorized,Visa,Work &amp;amp; Play"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2013/10/02/visa-mastercard-amex-digital-tokens/>