<https://shopping.yahoo.co.jp/products/category/2161/list>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://shopping.yahoo.co.jp/products/category/16539/list?X=price%2Bdesc&brandid=18143&brandid=16616&pf=800&pt=1999>