<http://schema.org/keywords>
"Theo d\u00F2ng th\u1EDDi s\u1EF1"^^<http://www.w3.org/2001/XMLSchema#string>
<http://vi.rfi.fr/quoc-te/20130107-my-mot-cuu-thuong-nghi-si-cong-hoa-lam-bo-truong-quoc-phong>