<http://schema.org/headline>
"\u4E09\u6D66\u7FD4\u5E73\u3001\u597D\u304D\u306A\u5973\u6027\u306B\u3064\u3044\u3066\u8A9E\u308B"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mdpr.jp/news/detail/1219148>