<http://schema.org/keywords>
"\u5706\u795Ecos,\u5706\u795ECOS,cos\u600E\u4E48\u73A9,\u6CA1\u94B1\u73A9cos,\u5706\u795E\u5B66\u59D0\u5316"^^<http://www.w3.org/2001/XMLSchema#string>
<https://catfan.me/koyomi/p197923>