<http://schema.org/headline>
"Facebook \u3067\u5199\u771F\u306B\u30B9\u30BF\u30F3\u30D7\u3092\u8CBC\u308B\u65B0\u6A5F\u80FD\u3001\u5168\u4E16\u754C\u3067\u9806\u6B21\u5B9F\u88C5"^^<http://www.w3.org/2001/XMLSchema#string>
<http://internetcom.jp/allnet/20150225/new-features-put-stamp-on-photos-in-facebook.html>