<http://schema.org/keywords>
"\u30F4\u30A1\u30FC\u30C7\u30A3\u30F3 \u30E2\u30FC\u30EA\u30B9"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/2016/02/04/maurice-white-dies_n_9163658.html>