<http://schema.org/headline>
"iPhone 6 \u3084 iOS 8 \u306E\u4E0D\u5177\u5408\u306A\u3069\u3067\u30A2\u30C3\u30D7\u30EB\u682A\u6025\u843D"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/2014/09/25/iphone6-ios8_n_5884994.html>