<http://schema.org/keywords>
"\u0111\u1EA3ng C\u1ED9ng s\u1EA3n"^^<http://www.w3.org/2001/XMLSchema#string>
<http://vi.rfi.fr/viet-nam/20131221-pham-chi-dung-dang-cong-san-viet-nam-dang-dan-phai-thua-nhan-xa-hoi-dan-su>