<http://schema.org/description>
"Earlier this month, the spread between the U.S. benchmark WTI crude and the global benchmark Brent crude had narrowed to around $4, the smallest gap in almost seven months. The narrowing spread"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2014/04/24/rising-crude-stockpiles-widen-spread-between-wti-a/20875055/?gen=1>