<https://sign-pro2.japan-ai.com/2024/09/13/%e3%83%a9%e3%83%9f%e3%83%8d%e3%83%bc%e3%83%88%e5%8a%a0%e5%b7%a5%ef%bc%88a3%e5%86%85%ef%bc%89-%e3%81%94%e6%b3%a8%e6%96%87-2-12/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://sign-pro2.japan-ai.com/2024/09/13/%E3%83%A9%E3%83%9F%E3%83%8D%E3%83%BC%E3%83%88%E5%8A%A0%E5%B7%A5%EF%BC%88a3%E5%86%85%EF%BC%89-%E3%81%94%E6%B3%A8%E6%96%87-2-12/>