<http://schema.org/keywords>
"\u0623\u062A\u0644\u064A\u062A\u0643\u0648 \u0645\u062F\u0631\u064A\u062F"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffpostarabi.com/2015/12/20/story_n_8848970.html>