<http://schema.org/keywords>
"\u30A4\u30F3\u30CA\u30FC\u30D6\u30E9\u30F3\u30C7\u30A3\u30F3\u30B0"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/soshikikasseika/3-points-planner-should-not-do_b_10749030.html>