<http://schema.org/headline>
"N\u1EA1n nh\u00E2n ng\u1EA1t kh\u00ED \u0111\u1ED9c r\u00F2 r\u1EC9 t\u1EEB h\u1EA7m biogas \u0111\u00E3 v\u01B0\u1EE3t qua nguy k\u1ECBch "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.vietnamplus.vn/nan-nhan-ngat-khi-doc-ro-ri-tu-ham-biogas-da-vuot-qua-nguy-kich/382825.vnp>