<http://schema.org/headline>
"H\u1EC7 th\u1ED1ng t\u00EAn l\u1EEDa S-300 c\u1EE7a Nga v\u00E0o b\u1EC7 ph\u00F3ng"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.baomoi.com/he-thong-ten-lua-s-300-cua-nga-vao-be-phong/c/11126611.epi>