<http://schema.org/keywords>
"\u55B5\u53CB\u4EC0\u4E48\u65F6\u5019\u5EFA\u7684,\u63A8\u7279list,\u5982\u4F55\u7528,\u55B5\u4E0A\u6821\u63A8\u7279"^^<http://www.w3.org/2001/XMLSchema#string>
<https://catfan.me/moexizer/p11922>