<http://schema.org/description>
"The process of mining minuscule gold particles out of tons of solid rock presents its fair share of challenges even when everything goes smoothly. So when every miner in turn faces one or more of"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2012/07/16/even-the-masters-of-gold-face-challenges/20278889/?gen=1>