<http://schema.org/keywords>
"\u6771\u4EAC\u30AA\u30EA\u30F3\u30D4\u30C3\u30AF"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/2015/09/02/ryuji-fujimura-talks-on-new-national-stadium_n_8031084.html>