<http://schema.org/description>
"After falling almost continuously through the second half of 2011, prices of PE, PS, and PVC were all on the way up last month, with PE prices already rebounding by the end of December."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ptonline.com/articles/commodity-resin-prices-move-upwards>