<http://schema.org/headline>
"\u7B2C7\u56DE\u3000\u65B0\u4EBA\u3055\u3093\u306E\u305F\u3081\u306E\u4ED5\u4E8B\u3067\u4F7F\u3048\u308BPerl\u57FA\u790E\u77E5\u8B58\uFF082\uFF09\uFF1APerl Hackers Hub"^^<http://www.w3.org/2001/XMLSchema#string>
<http://gihyo.jp/dev/serial/01/perl-hackers-hub/000702>