<http://schema.org/headline>
"\u590F\u306F\u3059\u3050\u305D\u3053\u266A\u300C\u30CF\u30EF\u30A4\u30A2\u30F3\u30CD\u30A4\u30EB\u300D\u3067\u5148\u3069\u308A\u590F\u30CD\u30A4\u30EB\u266A"^^<http://www.w3.org/2001/XMLSchema#string>
<http://itnail.jp/articles/3qiifjM4>