<http://schema.org/headline>
"\u8907\u6570\u306E\u6587\u5B57\u5217\u3092\u9023\u7D50\u3057\u3066\u8868\u793A\u3059\u308B"^^<http://www.w3.org/2001/XMLSchema#string>
<http://trendy.nikkeibp.co.jp/article/tec/excel2/20060801/117928/>