<http://schema.org/weight>
"378 grams (13.3 oz)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newbalance.com/pd/leather-928/WW928.html?cgid=273000&prefn1=sizeRefinement2&srule=By%20Price%20%28High-Low%29&dwvar_WW928_color=White&start=6&prefv1=women_shoes_5>