<http://schema.org/headline>
"\u304B\u308F\u3044\u3044\u30AD\u30E3\u30E9\u30AF\u30BF\u30FC\u306E\u5024\u5F15\u304D\u30B7\u30FC\u30EB\u3067\u30D5\u30FC\u30C9\u30EC\u30B9\u30AD\u30E5\u30FC"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.jprime.jp/articles/-/7291>