<http://schema.org/keywords>
"NATURAL GAS"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mcxcontrol.com/2015/09/01/buy-natural-gas-at-179-stoploss-176-40-tag-182-184-join-now-to-call-noe-09722907424-call-now/>