<http://schema.org/headline>
"\u82B1\u7C89\u75C7\u3084PM2.5\u5BFE\u7B56\u3001\u533B\u5E2B\u300C\u9F3B\u6BDB\u3082\u5207\u3089\u306A\u3044\u307B\u3046\u304C\u3044\u3044\u300D"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.jprime.jp/articles/-/4818>