<http://schema.org/keywords>
"\u3042\u3068\u5C11\u3057,\u541B\u306E\u305D\u3070\u306B,\u3044\u3061\u3073\u3087\u3046\u3067\u3082\u3044\u3044\u5F8C\u5C11\u3057"^^<http://www.w3.org/2001/XMLSchema#string>
<https://catfan.me/lusong1900/p127684>