<http://schema.org/headline>
"\u7B2C7\u56DE\u3000Heroku\u3092\u3082\u3063\u3068\u6D3B\u7528\u3057\u3088\u3046\uFF01\uFF1AHeroku\u3067\u4F5C\u308BFacebook\u30A2\u30D7\u30EA"^^<http://www.w3.org/2001/XMLSchema#string>
<http://gihyo.jp/dev/serial/01/heroku/0007>