<http://schema.org/position>
"3"^^<http://www.w3.org/2001/XMLSchema#integer>
<http://product.rakuten.co.jp/product/MITSUBISHI+MR-P15Y-S/3ebf86fae4c4357398916c9b9a0bfe39/summary/2/?sc=1&l2-id=pdt_sort_high_price>