<http://schema.org/headline>
"Nga ch\u00EDnh th\u1EE9c b\u00E1n S-400 cho \u1EA4n \u0110\u1ED9"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.baomoi.com/nga-chinh-thuc-ban-s-400-cho-an-do/c/20564903.epi>