<https://amazon-tool.jp/#listItem>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://amazon-tool.jp/usage/amazon%E8%BC%B8%E5%87%BA%E3%83%84%E3%83%BC%E3%83%ABkurofune%E3%81%AE%E4%BD%BF%E3%81%84%E6%96%B9/>