<http://schema.org/headline>
"\u51AC\u9650\u5B9A\u3092\u30CD\u30A4\u30EB\u3067\u697D\u3057\u3080\u2661\u30CE\u30EB\u30C7\u30A3\u30C3\u30AF\u67C4\u30CD\u30A4\u30EB\u3067\u6307\u5148\u307B\u3063\u3053\u308A\u266A"^^<http://www.w3.org/2001/XMLSchema#string>
<http://itnail.jp/articles/15lQE>