<http://schema.org/keywords>
"\u30B7\u30EA\u30A2 \u30A2\u30E1\u30EA\u30AB\u4EBA"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/2013/09/18/syria-conflict-armageddon_n_3945738.html>