<http://schema.org/keywords>
"\u30DC\u30EA\u30B9\u30FB\u30B8\u30E7\u30F3\u30BD\u30F3"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/2016/05/06/london-mayor-result-sadiq-khan_n_9861100.html>